一種用于MIMO系統(tǒng)的快速天線選擇算法
A Fast Antenna Selection Algorithm in MIMO System
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摘要: 在多徑衰落環(huán)境中, MIMO系統(tǒng)的信道容量隨天線數(shù)的增加呈線性增加，發(fā)射/接收天線選擇方法能以很小的性能損失換取射頻成本的大幅度降低，使MIMO系統(tǒng)不完全受射頻成本的限制。為快速選擇出使系統(tǒng)容量最優(yōu)的發(fā)射/接收天線子集，該文提出一種快速天線選擇算法的改進(jìn)算法。該算法通過實時更新優(yōu)化參數(shù)，大大降低計算復(fù)雜度。仿真結(jié)果表明，該算法在不影響系統(tǒng)容量的情況下大大減少了計算時間。
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關(guān)鍵詞:
- MIMO系統(tǒng); 多天線陣列; 天線選擇算法; 信道容量
Abstract: The capacity of MIMO system is increased linearly with the number of the antennas in multi-path fading environments, and transmit/receive antenna selection barters little lost of system performance for great decreasing of RF cost, making MIMO system not fully limited by RF cost. To quickly select transmit/receiver antenna subset making the system capacity best, this paper proposes an adapted algorithm for the fast antenna selection algorithm, which reduces the computation complexity by updating the quantities in real time. Simulation results indicate that the algorithm decreases computation time a lot without any system capacity lost. -
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