CAJ | 학술논문

针对空时相关的 MIMO 信道，提出了一种新颖的 Huffman 空时联合有限反馈预编码方法，提高了系统性能，并减少了反馈量。从信道的空间相关性出发，推导了迫零准则下预编码的构成，从而设计了一种旋转量化码本，减小了空间相关性对系统性能的影响。另外，针对信道的时间相关性，利用基于邻域的有限反馈来降低慢衰落信道的反馈量。同时，由于领域内各码字被选中的概率不同，可以利用Huffman编码进一步减少反馈量。
침대공시상관적 MIMO 신도，제출료일충신영적 Huffman 공시연합유한반궤예편마방법，제고료계통성능，병감소료반궤량。종신도적공간상관성출발，추도료박령준칙하예편마적구성，종이설계료일충선전양화마본，감소료공간상관성대계통성능적영향。령외，침대신도적시간상관성，이용기우린역적유한반궤래강저만쇠락신도적반궤량。동시，유우영역내각마자피선중적개솔불동，가이이용Huffman편마진일보감소반궤량。
For the MIMO channels with space correlation and time correlation, a novel joint space-time Huffman limited feedback precoding scheme was proposed which improves the system performance and reduces the amount of feedback. Based on space correlation, the precoding structure under zero-forcing (ZF) criterion was derived and the rotating quan-tization codebook was designed which reduces the effect of space correlation on system performance. In addition, in view of time correlation of channels, the scheme reduces the feedback data of channel state information (CSI) in the slow fad-ing channel by using neighborhood-based limited feedback. Due to different probabilities of codewords in the neighbor-hood, Huffman coding was adopted to further reduce the amount of feedback.