| 摘要 |
<p>A method of channel estimate in TDD-CDMA system, including the following steps: finishing the simultaneity estimate of the channel impulse response in one time slot of each user using Steiner estimator, getting the originality time domain disperse channel impulse response of all the users h<SUB>n,k</SUB>=[h<SUB>n,k,1</SUB>,h<SUB>n,k,2</SUB>, h<SUB>n,k,W</SUB>], k=1,2,...,K; calculating every tap adjudgement measurement of the time slot n of each user t<SUB>n,k,i</SUB>=at<SUB>n-1,k,i</SUB>+(l-a) h<SUB>n,k,I</SUB>|<SUP>2</SUP>, k=1,2,...,K; all the taps getting t<SUB>n,k</SUB>=[t<SUB>n,k,1</SUB>,t<SUB>n,k,2</SUB>, t<SUB>n,k,w</SUB>]; carrying out the variable length multi time slots sliding average to the each tap of the time slot n of each user, getting the average value Fomula (I), i=1,2,...,W, all the taps get h<SUB>n,k</SUB>=[h<SUB>n,k,1</SUB>,h<SUB>n,k,2</SUB>,...,h <SUB>n,k,W</SUB>], k =1,2,...,K; filtering the noise taps to the time slot n of each user, getting h'<SUB>n,k,i</SUB>; outputting the channel estimate value h'<SUB>n,k</SUB> of a user in time slot n; repeating the above steps until gets the channel estimate values of all the users.</p> |
