Improvement of bit error rate formula and optimization of main parameters in parallel combinatory spread spectrum system
Zhiguo Sun · Journal of Central South University(Science and Technology) · 2013
The operation principle of parallel combinatory spread spectrum(PCSS) system was analyzed,and the new bit error rate(BER) formula improved from original formula was derived.In order to optimize the main parameters of PCSS system,the influence of BER performance caused by the main parameters was mainly investigated combining the BER formulary.Finally,the selection principle of the main parameters was indicated in PCSS system.The research results show that under the same condition of signal-to-noise ratio,when the set number of pseudo-noise sequences is fixed,the BER performance decreases quickly while the number of selected pseudo-noise sequences increases.When the number of selected pseudo-noise sequences is fixed,the system performance(BER) decreases by stages when the set number of pseudo-noise sequences increase;however,the system complexity rises when the set number of pseudo-noise sequences increases linearly.