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首页> 外文会议>Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE >Layered turbo space-time coded MIMO-OFDM systems for time varying channels
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Layered turbo space-time coded MIMO-OFDM systems for time varying channels

机译：用于时变信道的分层Turbo空时编码MIMO-OFDM系统

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摘要

A joint detection-estimation scheme is proposed for multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems. The transmitter employs a layered turbo space-time code. The iterative scheme proposed for the receiver integrates in one scheme turbo decoding, co-antenna interference suppression and channel estimation. A main observation is that the high coding gain of the turbo space-time code can compensate for the application of a simple co-antenna interference suppression scheme and can also facilitate good channel estimates. The performance of the MIMO-OFDM system is validated by simulations under various channel conditions, including high Doppler. Numerical results show that for a 4 transmit 4 receive antenna (4T4R) system, with a data rate of 4 Mb/s over a 1.25 MHz bandwidth, a packet error rate (PER) of 10/sup -2/ is achieved at a signal-to-noise ratio (SNR) of 16 dB for a typical urban channel with Doppler frequencies as high as 200 Hz. For a 4T6R system, the same performance can be achieved for only 6 dB SNR.
机译：为多输入多输出正交频分复用（MIMO-OFDM）系统提出了联合检测估计方案。发射机采用分层的涡轮增压空间时间码。所提出的接收器提出的迭代方案集成在一个方案Turbo解码，共天线干扰抑制和信道估计中。主要观察是涡轮上的高编码增益可以补偿简单的共同天线干扰抑制方案的应用，并且还可以促进良好的信道估计。 MIMO-OFDM系统的性能通过仿真在各种沟道条件下进行验证，包括高多普勒。数值结果表明，对于4个发射4接收天线（4T4R）系统，数据速率超过1.25MHz带宽，在信号中实现了10 / SUP-2 /的分组错误率（PER）典型城市通道的噪声比（SNR）为16 dB，多普勒频率高达200 Hz。对于4T6R系统，可以仅实现相同的性能，仅为6 DB SNR实现。

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