CDMA移動(dòng)通信系統(tǒng)中的分組并行多用戶信號(hào)檢測(cè)器
A GROUPED PARALLEL MULTIUSER DETECTOR FOR CDMA MOBILE COMMUNICATIONS
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摘要: 該文提出了一種新的分組并行多用戶信號(hào)檢測(cè)器結(jié)構(gòu),推導(dǎo)了這種多用戶信號(hào)檢測(cè)器的檢測(cè)算法,算法的計(jì)算復(fù)雜度與用戶數(shù)呈線性關(guān)系,而性能優(yōu)于解相關(guān)檢測(cè)器,檢測(cè)器的總延時(shí)小于判決反饋多用戶信號(hào)檢測(cè)器。數(shù)值及仿真結(jié)果表明,當(dāng)接收到的干擾信號(hào)功率高于有用信號(hào):3dB以上時(shí),分組并行多用戶信號(hào)檢測(cè)器的誤碼性能趨于某一值,因而該檢測(cè)器可以有效地克服CDMA移動(dòng)通信中的遠(yuǎn)近效應(yīng)。Abstract: A new grouped parallel multiuser detector is proposed and the corresponding algorithm is derived in this paper. The complexity of this detector is linear to the number of users and the performance is better than the decorrelating detector. The detection s delay is smaller than the decision-feedback detector. Numerical and simulation results show that the bit error rate (BER) of the grouped parallel multiuser detector approaches some value when the multiple access interference (MAI) power is 3dB higher than the useful signal power, so this detector can resist near-far effect efficiently for CDMA mobile communications.
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