Comparing STORM and matched filtering for Part 15 indoor multi-path communication channels

Abstract

Consumer devices operating under Part 15 feature low cost transmitters and receivers which operate in the presence of multi-path propagation. Spread spectrum techniques mitigate multi-path effects or even provide temporal diversity reception while increasing the cost and complexity of Part 15 products. Scale time offset robust modulation, called STORM, is a novel transmitted reference spread spectrum technique that provides non-coherent RAKE performance while using a simple modulator and demodulator architecture. Resolvable multi-path propagation typically improves STORM performance, but, at least, slightly degrades matched filtering performance. STORM is unique because the transmitted reference and modulated signals are relatively time scaled prior to transmission.