Method for suppressing Doppler spread in high-speed mobile environment
A Doppler spread, high-speed mobile technology, applied in the field of receiving system design in a multi-antenna environment, can solve problems such as receiver performance deterioration, high complexity of demodulation and detection algorithms, and no consideration of channel estimation complexity. The effect of reducing the amount and reducing the redundancy
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[0022] The method for suppressing Doppler spread in a high-speed mobile environment of the present invention specifically includes the following steps:
[0023] Step 1. Use the pre-constructed orthogonal angular space basis vector U r , The orthogonal projection of the received multi-antenna signal Y, namely
[0024] among them
[0025] U r = e r ( 0 ) e r ( 1 L r ) . . . e r ( n r - 1 L r )
[0026] Where
[0027] e r ( Ω ) = 1 n r 1 exp ( - j 2 π Δ r Ω ) . . . exp - ( - j 2 π ( n r - 1 ) Δ r Ω )
[0028] Where L r Is the normalized length of the receiving antenna after the carrier wavelength is normalized, Δ r =L r / n r Is the normalized interval between antennas, n r Is the number of receiving antennas.
[0029] Step 2. In each orthogonal angular domain ...
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