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[0032] In order to clearly illustrate the new invention, firstly the prior art MMSE-OSIC 2 The method is introduced, and then the detection method of the present invention is described accordingly.
[0033] Suppose N T xN R The MIMO system can be expressed as:
[0034] y=Hx+z (1)
[0035] in y = [ y 1 y 2 · · · y N R ] T , Yes (N R ×1)-dimensional received signal vector; N T is the number of transmit antennas, N R is the number of receiving antennas.
[0036]
[0037] is the MIMO channel response; x = [ x 1 x ...
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PUM
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Abstract
The invention relates to an orthogonal frequency division multiplexing (OFDM) symbol detecting method which comprises the following steps: receiving OFDM modulation symbols transmitted by a plurality of sending antennae; receiving the information of coherence time and / or the information of coherence bandwidth; after carrying out the signal channel estimations of the signal channels from the sending antennae, smoothing each signal channel estimation by utilizing the coherence time and / or the coherence bandwidth so as to obtain an average value which corresponds to a plurality of the signal channel estimations; and carrying out signal detection on the received OFDM symbols by utilizing the single channel estimation average value of the plurality of signal channels. The detecting method can simultaneously consider the time correlation and the frequency correlation of the signal channels.
Description
technical field [0001] The present invention relates to a MIMO (Multiple Input Multiple Output) communication system, in particular to a receiver-end detection method in the MIMO system, which is used for MIMO detection in existing and future information transmission systems. Background technique [0002] According to the method in the prior art, when a signal transmitted from the transmitting end is detected at the receiving end of the MIMO system, the channel is first estimated. According to the estimated channel, use MMSE-OSIC (minimum mean square error-serial interference cancellation) or MMSE-OSIC 2 The (Minimum Mean Square Error-Serial Interference Cancellation-Multiple Candidates) method detects the received data independently, that is, it considers that the channels are independent and uncorrelated. [0003] Taking 2x4MIMO detection as an example, it is necessary to detect the transmitted data x1 and x2. Using the detection method in the prior art, x1 needs to be d...
Claims
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