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Performance Analysis of Narrowband Interference Suppression in Orthogonal Code Modulation Spread Spectrum System 被引量:3
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作者 Qi Yusheng and Ruan Yonghong (Department of Communication Engineering, Nanjing University of Posts and Telecommunications, Nanjing Nanjing 210003, P.R.China) 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 1999年第1期32-37,共6页
This paper analyzes the performance of both in-band and outband narrowband interference suppression in orthogonal code modulation spread spectrum system, and compares with conventional spread spectrum system at the sa... This paper analyzes the performance of both in-band and outband narrowband interference suppression in orthogonal code modulation spread spectrum system, and compares with conventional spread spectrum system at the same information transmission rate and spread spectrum bandwidth. Simulation results indicate that the antijamming (narrowband interference) performance obtained from orthogonal code modulation spread spectrum system is much better than that from conventional spread spectrum system. 展开更多
关键词 narrowband interference suppression processing goin orthogonal code modulation spread spectrum system
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Dual-channel Method for Fast Long PN-code Acquisition 被引量:3
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作者 FENG Wenquan XING Xiaodi ZHAO Qi WANG Zulin 《China Communications》 SCIE CSCD 2014年第5期60-70,共11页
Long PN-code acquisition is a difficult and time-consuming task due to long code period.To accelerate acquisition,folding methods like XFAST are widely used.In highdynamic environment however,the application of those ... Long PN-code acquisition is a difficult and time-consuming task due to long code period.To accelerate acquisition,folding methods like XFAST are widely used.In highdynamic environment however,the application of those methods are largely restricted due to nonnegligible residual frequency.This paper proposes a new dual-channel method for fast acquisition of long PN-code.In the proposed method,both non-overlapping local PNcode blocks are employed to correlate with input sample block;the detection process is eased through finding the maximum value among correlation results and verification is made with all the full and partial peaks taken into account.False alarm probabilities from analysis of the verification process are derived.Both theoretical and Monte Carlo simulations reveal that,with respect to acquisition probability and mean acquisition time under the same false alarm rate,dual-channel method has advantage over zero-padding and XFAST based folding methods under certain false alarm probabilities. 展开更多
关键词 spread spectrum long PN-code code acquisition detection probability
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