| 摘要 |
A MIMO method based on distributed transmission sources for transmitting a downlink data stream between M transmitting antennas and a mobile terminal having P receiving antennas, M and P>1, channels from at least two transmitting antennas to one of receiving antennas have different multipath distributions, said method comprises transmitting corresponding M substreams to the mobile terminal by using the same spreading code; estimating the multipath channel matrix; and processing the signal according to the multipath channel matrix to restore the downlink data stream, the estimating including measuring the total number of actual multipath received components having different delays in the transmitted signals; constructing the multipath channel matrix by taking the number as the multipath number, so that if the signal transmitted by one of the transmitting antennas to the receiving antenna has no multipath component corresponding to one of the delays, the channel parameter corresponding to the transmitting antenna, the receiving antenna and the delay is set as 0, the transmitting comprises adjusting the gain of said M sub-data streams based on the average signal quality measurement of uplink signals from the mobile terminal to said M transmitting antennas, so that average path losses of respective downlink channels are substantially equal.
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