Li Beiming

BER Performance Of Complex Parallel Combinatory Spread Spectrum Communication System

This paper presents a novel composite parallel combinatory spread spectrum (CPC/SS) communication system. CPC/SS system can be designed to have more higher data transmission capability than spread spectrum (SS) communication system, even several times on Gaussian channels compared to ordinary parallel combinatory spread spectrum (PC/SS) system. In the proposed system, modulation of position code and state are applied to each simultaneously transmitting PN sequences. The symbol error rate and average bit error rate are analyzed to evaluate the performance of the proposed systems. Furthermore, CPC/SS system has excellent secret property than PC/SS and CDMA communication systems.

Complex Position Code Parallel Combinatory Spread Spectrum Communication System with FEC Technique

Complex Position Code Parallel Combinatory Spread Spectrum (CPC/PC/SS) communication system with forward error correction (FEC) coding scheme is proposed in this paper, and performances are analyzed. CPC/PC/SS system with FEC coding scheme can be designed to have higher data transmission capability, even several times compared to ordinary PC/SS system on Gaussian channel.The proposed FEC coding is separately applied to the combination data of orthogonal codes and the state data of their transmitting orthogonal code, and less redundant FEC code is enough to the state data of orthogonal codes by this coding scheme. Therefore, the total information rate exceeds that offered by the conventional overall FEC coding is applied. Simulation results show that the error rate performance of the CPC/PC/SS systems equipped with the proposed FEC coding is lower than conventional PC/SS system.

BER Performance of Position Code Parallel Combinatory Spread Spectrum System

A novel position code parallel combinatory spread spectrum (PC/PC/SS) communication system is proposed in this paper. PC/PC/SS system can be designed to have higher data transmission capability, even several times compared to ordinary PC/SS system on Gaussian channel. In the proposed system, modulation of position code is applied to each simultaneously transmitting PN sequences. The symbol error rate and average bit error rate performances are analyzed to evaluate the performance of the proposed systems. Furthermore, PC/PC/SS system has excellent secret property than PC/SS and M-ary/SS systems.

A novel Position Code Parallel Combinatory Spread Spectrum communication system

This paper presents a novel Position Code Parallel Combinatory Spread Spectrum (PC/PC/SS) communication system. PC/PC/SS system can be designed to have higher data transmission capability, even several times compared to ordinary PC/SS system on Gaussian channel. In the ordinary PC/SS system, multip1e pseudo-noise (PN) sequences are simultaneously transmitted out of a pre-assigned spreading sequence set. In the proposed system, modulation of Position Code is applied to the starting position of each simultaneously transmitting PN sequences. The symbol error rate and average bit error rate are analyzed to evaluate the performance of the proposed systems. Furthermore, PC/PC/SS system has excellent secret property than PC/SS and M-ary/SS communication systems.