兩種插值信道估計方法的比較
Comparison of Two Channel Estimation Interpolation Methods
-
摘要: 在瑞利衰落信道中，使用時分復用的導頻信號輔助的信道估計方案時，提出了在使用極大似然方法估計出導頻符號的信道參數(shù)之后，再利用一個時隙上所有導頻符號的Chebyshev多項式的數(shù)學插值估計數(shù)據(jù)符號信道參數(shù)的方法。同時比較了分段線性插值加遞歸的信道估計方法。仿真結(jié)果表明，使用Chebyshev多項式的數(shù)學插值估計信道參數(shù)的方法比使用線性插值加線性遞歸的信道估計方法能更好的改善系統(tǒng)的性能。
-
關(guān)鍵詞:
- CDMA; 信道估計; Chebyshev多項式; 插值; 遞歸
Abstract: The pilot-assisted channel estimation method is studied in time-division multiplexing Rayleigh fading channel. A channel tracking method is proposed by using the Chebyshev interpolation polynomials after the channel coefficients of pilot symbols in a time-slot being estimated employing ML estimation. It is compared with the segment linear interpolation method with regression. The simulation results show that the method can track the fading channel accurately. By using the proposed estimation method, the systems BER performance can be improved distinctly. -
計量
- 文章訪問數(shù): 2462
- HTML全文瀏覽量: 106
- PDF下載量: 1009
- 被引次數(shù): 0
下載:
