頻率選擇性衰落信道下一種空時分組碼的直接解碼
Direct decoding in a space-time block code for frequency-selective fading channels
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摘要: 該文針對 3個發(fā)射天線，1個接收天線的空時分組碼系統(tǒng)，提出了頻率選擇性衰落信道下，無需信道估計，直接對空時分組碼進行解碼的方法，把子空間方法應(yīng)用于空時編碼當(dāng)中，從信號處理和空時編碼兩個方面考慮空時分組碼的直接解碼問題，利用空時分組碼所特有的正交設(shè)計，較為方便地從子空間中解出信號信息，從單載波的角度，解決了頻率選擇性衰落下空時分組碼的解碼問題。Monte-Carlo仿真給出了直接解碼算法的性能，并與使用準(zhǔn)確信道信息的解碼算法做了性能比較。
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關(guān)鍵詞:
- 空時分組碼; 直接解碼; 頻率選擇性衰落信道; 陣列信號處理
Abstract: This paper proposes a decoding scheme in space-time block code system with three transmitting antennas and one receiving antenna for frequency-selective fading channels, which does not require channel estimation at the transmitter or receiver. By applying the subspace method to space-time codes, the direct decoding is accomplished from both a signal processing and space-time coding perspective. With the special orthogonal design of space-time block codes, the input of the space-time block code system is obtained from the subspace. The direct decoding is addressed for frequency-selective fading channels from a single carrier perspective. Monte Carlo simulations show the performance of direct decoding and the performance com-parison with the decoder using the perfect channel information. -
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