MIMO系統(tǒng)的非相干天線選擇算法
Noncoherent Antenna Selection Algorithem for MIMO System
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摘要: 該文提出了多天線傳輸系統(tǒng)的非相干天線選擇(NON-AS)算法，將廣義似然比檢驗(yàn)(GLRT)與天線選擇結(jié)合應(yīng)用于U碼傳輸系統(tǒng)，天線選擇和信號(hào)檢測(cè)無(wú)需信道狀態(tài)信息。與相干檢測(cè)的天線選擇相比，NON-AS算法不需要估計(jì)信道，大大降低了系統(tǒng)復(fù)雜性。該文只考慮了接收天線選擇，天線選擇的準(zhǔn)則是基于每個(gè)天線接收到的信號(hào)向量F-2范數(shù)。仿真結(jié)果表明，在高信噪比條件下，選擇有最大范數(shù)的接收天線子集，系統(tǒng)能實(shí)現(xiàn)和使用全部接收天線的U碼傳輸系統(tǒng)漸近相同的分集增益。
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關(guān)鍵詞:
- 非相干天線選擇;廣義似然比檢驗(yàn);信號(hào)相關(guān)度;分集增益
Abstract: This paper presents a NON-coherent Antenna Selection (NON-AS) algorithm for multi-antenna transmission system. The combination of Generalized Likelihood Ratio Test (GLRT) and Antenna Selection (AS) is applied to Unitary (U)signal transmission system, and antenna selection and signal detection do not require Channel State Information (CSI). Therefore, the NON-AS algorithm, compared with coherent antenna selection, can greatly reduce system complexity. This paper only discusses the selection of receiving antenna. Selection criterion is based on the Frobenius-2 norm of received signal vector at each receiving antenna. Simulation results indicate that under the condition of high Signal to Noise Ratio (SNR), by selecting a set of receiving antennas which observe the largest Frobenius-2 norm of received signal vector, the same diversity gain as the one obtained by using all the receiving antennas can be achieved. -
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