DSP implementation of an asymmetric decision feedback equalization system.

摘要

Presented in this thesis is a new asymmetric digital signal processing (ADSP) system for an indoor wireless communications link, intended to supplement the coverage of an indoor-wired computer network. The objective of this thesis is to minimize the portable transceiver complexity at the expense of the base station complexity.; A digital signal processor (DSP) TMS320C30 from Texas Instruments is used to emulate the base station of the ADSP system. A desktop personal computer is used to emulate the portable unit of the ADSP system.; The ADSP hardware system is tested under different indoor wireless channel conditions. The experimental results show that the ADSP system has satisfactory and predictable performance. In most cases the proposed ADSP system has the same ability as a symmetric system to remove inter-symbol interference introduced by a multi-path channel. In some cases, a slight increase in the number of equalizer taps is necessary for the ADSP system to have the same performance as the symmetric system.