Pub Date : 2001-03-20DOI: 10.1109/SPAWC.2001.923926
K. Nishikawa, H. Kiya
This paper proposes a new structure of the affine projection algorithm (APA) based on the subband adaptive system (SAS). It is known that the APA can increase the rate of convergence when the input signal is highly correlated. The SAS used in the proposed structure differs from the conventional ones, i.e., it does not include the decimation operations, the adaptive filters in subbands share the same coefficients, and coefficients of analysis filters are determined according to the Hadamard transform. These differences make the proposed structure have some advantages over the conventional structures of the APA, e.g., we can greatly reduce the computational requirement for implementing the APA because the proposed structure does not require the matrix inversion.
{"title":"New structure of affine projection algorithm using a novel subband adaptive system","authors":"K. Nishikawa, H. Kiya","doi":"10.1109/SPAWC.2001.923926","DOIUrl":"https://doi.org/10.1109/SPAWC.2001.923926","url":null,"abstract":"This paper proposes a new structure of the affine projection algorithm (APA) based on the subband adaptive system (SAS). It is known that the APA can increase the rate of convergence when the input signal is highly correlated. The SAS used in the proposed structure differs from the conventional ones, i.e., it does not include the decimation operations, the adaptive filters in subbands share the same coefficients, and coefficients of analysis filters are determined according to the Hadamard transform. These differences make the proposed structure have some advantages over the conventional structures of the APA, e.g., we can greatly reduce the computational requirement for implementing the APA because the proposed structure does not require the matrix inversion.","PeriodicalId":435867,"journal":{"name":"2001 IEEE Third Workshop on Signal Processing Advances in Wireless Communications (SPAWC'01). Workshop Proceedings (Cat. No.01EX471)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116827884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-03-20DOI: 10.1109/SPAWC.2001.923874
O. Ertug, B. Baykal
RAKE receivers suffer degradation in performance under fast fading due to errors in channel state estimation. The wide-sense stationary uncorrelated scatterer channel model lends itself to a time-frequency canonical representation, and provides additional diversity in the frequency axis. Using the joint multipath-Doppler diversity model based on this canonical representation, we propose a nonlinear time-frequency decorrelating decision-feedback multiuser detector for synchronous CDMA which utilizes decisions of the stronger users when forming the decisions for the weaker ones. Analytical and simulation results based on realistic fast-fading assumptions demonstrate that the proposed decision-feedback multiuser detector promises substantially improved bit-error-rate performance compared to the time-frequency decorrelating multiuser detector for the weaker users, while the error probability of the weakest user approaches the single-user bound as the interferers grow stronger. The proposed detector exhibits strong resistance to the near-far effect for all users and the time complexity per bit is linear in the number of users.
{"title":"Time-frequency decorrelating decision-feedback multiuser detector over fast-fading multipath channels for synchronous DS-CDMA systems","authors":"O. Ertug, B. Baykal","doi":"10.1109/SPAWC.2001.923874","DOIUrl":"https://doi.org/10.1109/SPAWC.2001.923874","url":null,"abstract":"RAKE receivers suffer degradation in performance under fast fading due to errors in channel state estimation. The wide-sense stationary uncorrelated scatterer channel model lends itself to a time-frequency canonical representation, and provides additional diversity in the frequency axis. Using the joint multipath-Doppler diversity model based on this canonical representation, we propose a nonlinear time-frequency decorrelating decision-feedback multiuser detector for synchronous CDMA which utilizes decisions of the stronger users when forming the decisions for the weaker ones. Analytical and simulation results based on realistic fast-fading assumptions demonstrate that the proposed decision-feedback multiuser detector promises substantially improved bit-error-rate performance compared to the time-frequency decorrelating multiuser detector for the weaker users, while the error probability of the weakest user approaches the single-user bound as the interferers grow stronger. The proposed detector exhibits strong resistance to the near-far effect for all users and the time complexity per bit is linear in the number of users.","PeriodicalId":435867,"journal":{"name":"2001 IEEE Third Workshop on Signal Processing Advances in Wireless Communications (SPAWC'01). Workshop Proceedings (Cat. No.01EX471)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124457319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-03-20DOI: 10.1109/SPAWC.2001.923916
D. Astely, A. Artamo
Uplink RAKE combining with receiver diversity for a WCDMA FDD radio link in the presence of interference is considered. Expressions for the correlation between interference of different fingers after despreading are presented. By taking the correlation into account when combining the fingers, interference can be rejected. Spatial interference rejection combining (IRC), which accounts only for spatial correlation of the interference, and spatio-temporal IRC, which accounts also for correlation between fingers with different delays, are compared for rejection of both narrowband and wideband external interference. External interference may stem from narrowband communication systems operating in the same or distant frequency bands and by spectral regrowth from wideband systems operating in adjacent bands.
{"title":"Uplink spatio-temporal interference rejection combining for WCDMA","authors":"D. Astely, A. Artamo","doi":"10.1109/SPAWC.2001.923916","DOIUrl":"https://doi.org/10.1109/SPAWC.2001.923916","url":null,"abstract":"Uplink RAKE combining with receiver diversity for a WCDMA FDD radio link in the presence of interference is considered. Expressions for the correlation between interference of different fingers after despreading are presented. By taking the correlation into account when combining the fingers, interference can be rejected. Spatial interference rejection combining (IRC), which accounts only for spatial correlation of the interference, and spatio-temporal IRC, which accounts also for correlation between fingers with different delays, are compared for rejection of both narrowband and wideband external interference. External interference may stem from narrowband communication systems operating in the same or distant frequency bands and by spectral regrowth from wideband systems operating in adjacent bands.","PeriodicalId":435867,"journal":{"name":"2001 IEEE Third Workshop on Signal Processing Advances in Wireless Communications (SPAWC'01). Workshop Proceedings (Cat. No.01EX471)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124714474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-03-20DOI: 10.1109/SPAWC.2001.923921
T. Deng, Wu-Sheng Lu
This paper proposes a closed-form weighted least-squares solution for designing variable two-dimensional (2D) digital filters with continuously variable 2D fractional delays. First, the coefficients of the variable 2D FIR filter are represented by using the polynomials of a pair of fractional delays (p/sub 1/,p/sub 2/). Then the weighted squared-error function of the variable 2D frequency response is derived without sampling the two frequencies (w/sub 1/,w/sub 2/) and the two fractional delays (p/sub 1/, p/sub 2/), which leads to a significant reduction in computational complexity. With the assumption that the overall weighting function is separable and stepwise, the design problem is reduced to the minimization of the weighted squared-error function. Finally, the closed-form solutions for the optimal coefficient matrices of the variable 2D FIR filter are derived.
{"title":"Discretization-free method for designing variable fractional delay 2-D FIR filters","authors":"T. Deng, Wu-Sheng Lu","doi":"10.1109/SPAWC.2001.923921","DOIUrl":"https://doi.org/10.1109/SPAWC.2001.923921","url":null,"abstract":"This paper proposes a closed-form weighted least-squares solution for designing variable two-dimensional (2D) digital filters with continuously variable 2D fractional delays. First, the coefficients of the variable 2D FIR filter are represented by using the polynomials of a pair of fractional delays (p/sub 1/,p/sub 2/). Then the weighted squared-error function of the variable 2D frequency response is derived without sampling the two frequencies (w/sub 1/,w/sub 2/) and the two fractional delays (p/sub 1/, p/sub 2/), which leads to a significant reduction in computational complexity. With the assumption that the overall weighting function is separable and stepwise, the design problem is reduced to the minimization of the weighted squared-error function. Finally, the closed-form solutions for the optimal coefficient matrices of the variable 2D FIR filter are derived.","PeriodicalId":435867,"journal":{"name":"2001 IEEE Third Workshop on Signal Processing Advances in Wireless Communications (SPAWC'01). Workshop Proceedings (Cat. No.01EX471)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129045057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-03-20DOI: 10.1109/SPAWC.2001.923928
S. Ozaydin, B. Baykal
Efficient quantization of linear predictive coding (LPC) filter coefficients play an essential role in very-low-bit-rate speech coding systems. This paper examines a new suboptimal matrix quantization scheme for LPC parameters, called multi-stage matrix quantization (MSMQ), which operates at bit rates between 400 and 800 bit/s. With the new matrix quantization method, using a 22.5 ms LPC analysis frame, spectral distortion about 1 dB is achieved at 800 bit/s. In the proposed coder, line spectral frequency (LSF) parameters of multiple consecutive frames are grouped into a superframe and jointly quantized. The new residual LSF vector quantization scheme gives a bit rate reduction in MSMQ without any additional complexity or storage. The new MSMQ leads into several schemes of various computational complexity/storage characteristics.
线性预测编码(LPC)滤波器系数的有效量化在极低比特率语音编码系统中起着至关重要的作用。本文研究了LPC参数的一种新的次优矩阵量化方案，称为多级矩阵量化(MSMQ)，它的比特率在400到800比特/秒之间。采用新的矩阵量化方法，使用22.5 ms LPC分析帧，在800 bit/s下实现了约1 dB的频谱失真。该编码器将多个连续帧的线谱频率(LSF)参数组合成一个超帧并进行联合量化。新的残差LSF矢量量化方案在不增加复杂性和存储空间的情况下降低了MSMQ的比特率。新的MSMQ导致了几种不同计算复杂度/存储特性的方案。
{"title":"Multi stage matrix quantization for very low bit rate speech coding","authors":"S. Ozaydin, B. Baykal","doi":"10.1109/SPAWC.2001.923928","DOIUrl":"https://doi.org/10.1109/SPAWC.2001.923928","url":null,"abstract":"Efficient quantization of linear predictive coding (LPC) filter coefficients play an essential role in very-low-bit-rate speech coding systems. This paper examines a new suboptimal matrix quantization scheme for LPC parameters, called multi-stage matrix quantization (MSMQ), which operates at bit rates between 400 and 800 bit/s. With the new matrix quantization method, using a 22.5 ms LPC analysis frame, spectral distortion about 1 dB is achieved at 800 bit/s. In the proposed coder, line spectral frequency (LSF) parameters of multiple consecutive frames are grouped into a superframe and jointly quantized. The new residual LSF vector quantization scheme gives a bit rate reduction in MSMQ without any additional complexity or storage. The new MSMQ leads into several schemes of various computational complexity/storage characteristics.","PeriodicalId":435867,"journal":{"name":"2001 IEEE Third Workshop on Signal Processing Advances in Wireless Communications (SPAWC'01). Workshop Proceedings (Cat. No.01EX471)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131836478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-03-20DOI: 10.1109/SPAWC.2001.923934
Sheng-Hong Li, Hong-Wen Zhu, Jian-hua Li
The problem of modeling MPEG-1 VBR video traffic is studied. Based on the analysis of their statistical characteristics, this paper presents a new direct frame-layered traffic model for VBR video traffic using the MPEG-1 scheme and group of pictures (GOP) pattern "IBBPBBPBBPBB". The model can reflect the first- and second-order frame-layered statistical characteristics of this video traffic well simultaneously. Simulation results also show that the model can capture the behavior of this traffic in a queue effectively.
{"title":"Study of a new model for MPEG-1 video traffics in ATM networks","authors":"Sheng-Hong Li, Hong-Wen Zhu, Jian-hua Li","doi":"10.1109/SPAWC.2001.923934","DOIUrl":"https://doi.org/10.1109/SPAWC.2001.923934","url":null,"abstract":"The problem of modeling MPEG-1 VBR video traffic is studied. Based on the analysis of their statistical characteristics, this paper presents a new direct frame-layered traffic model for VBR video traffic using the MPEG-1 scheme and group of pictures (GOP) pattern \"IBBPBBPBBPBB\". The model can reflect the first- and second-order frame-layered statistical characteristics of this video traffic well simultaneously. Simulation results also show that the model can capture the behavior of this traffic in a queue effectively.","PeriodicalId":435867,"journal":{"name":"2001 IEEE Third Workshop on Signal Processing Advances in Wireless Communications (SPAWC'01). Workshop Proceedings (Cat. No.01EX471)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115746010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-03-20DOI: 10.1109/SPAWC.2001.923851
M. Sirbu, J. Mannerkoski, V. Koivunen, Yinglu Zhang
The main goal of this paper is to find whether or not blind equalization can be used in EDGE (enhanced data rate for GSM evolution) systems in the perspective of increasing the data rate. An EDGE system uses 8-PSK modulation as well as the binary GMSK modulation defined for GSM. The main problem is that GMSK modulation is nonlinear, but most blind equalization techniques are derived for linear modulation. Linear approximation of the real GMSK signal has to be performed in order to apply blind equalization. It is of interest to determine if the input sequence resulting from linearisation and the derotation in the receiver is white, which is a key assumption in many blind equalization algorithms. We show that the whiteness property is preserved. We make a comparison among three blind algorithms: two fractionally spaced and one based on baud-rate HOS. The simulation results indicate that blind equalization performs well and the algorithms have potential as a feasible solution to channel tracking in EDGE systems.
{"title":"On the feasibility of blind equalization for EDGE systems","authors":"M. Sirbu, J. Mannerkoski, V. Koivunen, Yinglu Zhang","doi":"10.1109/SPAWC.2001.923851","DOIUrl":"https://doi.org/10.1109/SPAWC.2001.923851","url":null,"abstract":"The main goal of this paper is to find whether or not blind equalization can be used in EDGE (enhanced data rate for GSM evolution) systems in the perspective of increasing the data rate. An EDGE system uses 8-PSK modulation as well as the binary GMSK modulation defined for GSM. The main problem is that GMSK modulation is nonlinear, but most blind equalization techniques are derived for linear modulation. Linear approximation of the real GMSK signal has to be performed in order to apply blind equalization. It is of interest to determine if the input sequence resulting from linearisation and the derotation in the receiver is white, which is a key assumption in many blind equalization algorithms. We show that the whiteness property is preserved. We make a comparison among three blind algorithms: two fractionally spaced and one based on baud-rate HOS. The simulation results indicate that blind equalization performs well and the algorithms have potential as a feasible solution to channel tracking in EDGE systems.","PeriodicalId":435867,"journal":{"name":"2001 IEEE Third Workshop on Signal Processing Advances in Wireless Communications (SPAWC'01). Workshop Proceedings (Cat. No.01EX471)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134115724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-03-20DOI: 10.1109/SPAWC.2001.923834
A. Swindlehurst, G. German, J. Wallace, M. Jensen
This paper presents the results of experiments obtained with a narrowband, multiple-input multiple-output (MIMO) channel probe in an indoor office/laboratory environment. The system employs ten transmit and ten receive antennas, and computes the 10/spl times/10 narrowband channel matrix at 2.4 GHz every 80 milliseconds. We use the data to study the distribution of the channel coefficients, their temporal variability, and the resulting effects on channel capacity. We also compare the empirical results with those predicted by WiSE, a state-of-the-art channel simulator based on ray-tracing from Lucent Technologies.
{"title":"Experimental measurements of capacity for MIMO indoor wireless channels","authors":"A. Swindlehurst, G. German, J. Wallace, M. Jensen","doi":"10.1109/SPAWC.2001.923834","DOIUrl":"https://doi.org/10.1109/SPAWC.2001.923834","url":null,"abstract":"This paper presents the results of experiments obtained with a narrowband, multiple-input multiple-output (MIMO) channel probe in an indoor office/laboratory environment. The system employs ten transmit and ten receive antennas, and computes the 10/spl times/10 narrowband channel matrix at 2.4 GHz every 80 milliseconds. We use the data to study the distribution of the channel coefficients, their temporal variability, and the resulting effects on channel capacity. We also compare the empirical results with those predicted by WiSE, a state-of-the-art channel simulator based on ray-tracing from Lucent Technologies.","PeriodicalId":435867,"journal":{"name":"2001 IEEE Third Workshop on Signal Processing Advances in Wireless Communications (SPAWC'01). Workshop Proceedings (Cat. No.01EX471)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132209660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-03-20DOI: 10.1109/SPAWC.2001.923872
A. Hazmi, J. Rinne, M. Renfors
We study the quality of terrestrial digital video broadcasting (DVB-T) transmission over a cable TV network. Generally, when terrestrial digital TV signals are distributed by cable TV, a conversion from DVB-T (OFDM) to DVB-C (single carrier) is needed in the head-end. In order to avoid this costly conversion and to transmit the DVB-T signal directly in the existent cable channel, many requirements have to be satisfied. It is known that phase noise represents the main limitation for OFDM based systems. In this contribution, we demonstrate the sensitivity of the OFDM system to phase noise effects by using a dynamic model for the CATV channel. We conclude by giving the specifications for a converter that should allow the DVB-T system to function in the CATV network.
{"title":"DVB-T signal over cable TV network and phase noise requirements","authors":"A. Hazmi, J. Rinne, M. Renfors","doi":"10.1109/SPAWC.2001.923872","DOIUrl":"https://doi.org/10.1109/SPAWC.2001.923872","url":null,"abstract":"We study the quality of terrestrial digital video broadcasting (DVB-T) transmission over a cable TV network. Generally, when terrestrial digital TV signals are distributed by cable TV, a conversion from DVB-T (OFDM) to DVB-C (single carrier) is needed in the head-end. In order to avoid this costly conversion and to transmit the DVB-T signal directly in the existent cable channel, many requirements have to be satisfied. It is known that phase noise represents the main limitation for OFDM based systems. In this contribution, we demonstrate the sensitivity of the OFDM system to phase noise effects by using a dynamic model for the CATV channel. We conclude by giving the specifications for a converter that should allow the DVB-T system to function in the CATV network.","PeriodicalId":435867,"journal":{"name":"2001 IEEE Third Workshop on Signal Processing Advances in Wireless Communications (SPAWC'01). Workshop Proceedings (Cat. No.01EX471)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133759583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-03-20DOI: 10.1109/SPAWC.2001.923879
A. Mahmoud, C. Thierry, S. Samir
A new interference cancellation (IC) scheme is proposed for the uplink of direct-sequence code division multiple access (DS-CDMA) systems communicating over mobile radio channels. The IC detector presented belongs to the subclass of multiuser detectors that employs a multi-stage successive interference cancellation (SIC), and the aim is to show that a low complexity detector can perform well in a mobile radio environment. The new multi-stage SIC scheme includes non-decision directed IC with a modified RAKE combiner to use the diversity in frequency-selective channels, and it works with a finite processing window sliding each iteration to process a new data symbol. The performance is evaluated with known asynchronous delays and channel parameters, in a multipath environment. The results show that the proposed detector is near-far resistant and the loss in performance compared to the single-user bound is small.
{"title":"Asynchronous multi-stage SIC detector for DS-CDMA systems over multipath fading channels","authors":"A. Mahmoud, C. Thierry, S. Samir","doi":"10.1109/SPAWC.2001.923879","DOIUrl":"https://doi.org/10.1109/SPAWC.2001.923879","url":null,"abstract":"A new interference cancellation (IC) scheme is proposed for the uplink of direct-sequence code division multiple access (DS-CDMA) systems communicating over mobile radio channels. The IC detector presented belongs to the subclass of multiuser detectors that employs a multi-stage successive interference cancellation (SIC), and the aim is to show that a low complexity detector can perform well in a mobile radio environment. The new multi-stage SIC scheme includes non-decision directed IC with a modified RAKE combiner to use the diversity in frequency-selective channels, and it works with a finite processing window sliding each iteration to process a new data symbol. The performance is evaluated with known asynchronous delays and channel parameters, in a multipath environment. The results show that the proposed detector is near-far resistant and the loss in performance compared to the single-user bound is small.","PeriodicalId":435867,"journal":{"name":"2001 IEEE Third Workshop on Signal Processing Advances in Wireless Communications (SPAWC'01). Workshop Proceedings (Cat. No.01EX471)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133465121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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