The Physical Channels Alternative Constructions for Wireless Systems and Network

Abstract

A variant of code-time-division multiple access is considered. The emitted radio signal is a structured relatively short code constructions that performing a direct extension of the carrier frequency spectrum, immediately consecutive and modulating it. Herewith, the uniform amplitude envelope (modulus of the complex envelope) of the resultant group signal emitted into the radio channel is retained, if the influence of low-pass filters that limit out-of-band emissions is not included. The structure of the codes allows to implement modulation methods of the carrier frequency, similar to QAM, but more efficient. All structures include fragments of arbitrarily long code that couple them and is designed for solving a wide range of tasks related to the temporal structuring of the communication channel, synchronization, processing of multipath signals in the Rake-receiver, positioning, etc.