空間相關(guān)MIMO信道中一種自適應的天線選擇算法
An Adaptive Antenna Selection Scheme for Spatial Correlated MIMO Channel
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摘要: 該文研究了空間相關(guān)性對于多輸入多輸出空間復用(MIMO-SM)系統(tǒng)性能影響問題，并提出了一種適用于迭代迫零軟干擾抵消接收機的天線選擇算法。平坦衰落信道中，發(fā)送天線相關(guān)性將降低接收天線選擇算法的性能，該文所研究的算法采用可變的接收天線數(shù)以獲得不同的接收分集，增加一定的硬件實現(xiàn)復雜度但可以顯著減小發(fā)送天線相關(guān)性引起的誤碼性能下降。在2個發(fā)送天線，4個接收天線的天線配置場合，計算機仿真證實該算法在幀誤碼率上優(yōu)于簡單的行相關(guān)算法(CBM)。
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關(guān)鍵詞:
- MIMO; 空間復用; 衰落相關(guān)性;天線選擇; Turbo 處理; 分集
Abstract: In this paper, the impact of spatial fading correlation on Multiple-Input Multiple-Output Spatial Multiplexing (MIMO-SM) systems is investigated, where antenna selection and soft canceller with iterative decoding is considered. It turns out that the number of receive antennas to be selected at the receiver plays an important part when dealing with high antennas correlation in flat fading channel. To mitigate the effects of highly spatial correlation at the transmitter while hardware costs and computational burden are tolerable, the variable receive antennas is selected to obtain different receiver diversity. It will be shown via simulation that in some cases this adaptive antenna selection scheme with two transmit antennas and four receive antennas offers better frame error rate performance than the simple row Correlation-Based Method (CBM). -
Bocskei H, Borgmann M, Paulraj A J. Impact of the propagation environment on the performance of space-frequency coded MIMO-OFDM[J].IEEE J. on Select. Areas Commun.2003, 21(4):427-[11]Benedetto S, Divsalar D, Montorsi G, Pollara F. A soft-input soft-output APP model for iterative decoding of concatenated codes[J].IEEE Communications Letters.1997, 1(1):22-24 -
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