Method for inhibiting residual multi-user interference in two-dimensional block spread spectrum system based on parallel interference cancellation and iterative detection
A multi-user interference and iterative detection technology, applied in the field of residual multi-user interference suppression, can solve problems such as interference and residual multi-user in two-dimensional block spread spectrum system, achieve good bit error rate (BER) performance, and improve residual multi-user interference effect
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specific Embodiment approach 1
[0074] Specific implementation mode one: the following combination Figure 4 This embodiment is described. This embodiment is based on the residual multi-user interference suppression method in the two-dimensional block spread spectrum system based on parallel interference cancellation and iterative detection. Under the SC-CDMA system:
[0075] Launch process:
[0076] Step 1, respectively performing chip-level spread spectrum on the U-channel modulated signal to obtain the signal after U-channel chip-level spread spectrum;
[0077] Step 2, carry out block spread spectrum respectively to the signal after U chip-level spread spectrum obtained in step 1, obtain the signal after U block spread spectrum;
[0078] Step 3, adding the U-channel block-spread signals obtained in step 2 into guard interval processing respectively, obtaining the processed U-channel signal, and transmitting to the channel through the transmitting antenna;
[0079] Receiving process:
[0080] Step 4, us...
specific Embodiment approach 2
[0092] Specific implementation mode two: the following combination Figure 5 Describe this embodiment, this embodiment is based on the residual multi-user interference suppression method in the two-dimensional block spread spectrum system of parallel interference cancellation and iterative detection, under the MC-CDMA system:
[0093] Launch process:
[0094] Step 1. Carry out chip-level spreading and interleaving of U-channel modulated signals respectively, to obtain signals after U-channel chip-level spreading;
[0095] Step 2, performing inverse fast Fourier transform on the U-channel chip-level spread-spectrum signal obtained in step 1, respectively, to obtain the time-domain signal after the U-channel transform;
[0096] Step 3, performing block spread spectrum respectively on the time-domain signal after U channel transformation obtained in step 2, to obtain the signal after U channel block spread spectrum;
[0097] Step 4, add the U-channel block-spread signals obtain...
specific Embodiment approach 3
[0112] Specific implementation mode three: the following combination Figure 6 This embodiment is described. This embodiment is based on the residual multi-user interference suppression method in the two-dimensional block spread spectrum system based on parallel interference cancellation and iterative detection. Under the SC-CDMA system:
[0113] Launch process:
[0114] Step 1, respectively performing chip-level spread spectrum on the U-channel modulated signal to obtain the signal after U-channel chip-level spread spectrum;
[0115] Step 2, carry out block spread spectrum respectively to the signal after U chip-level spread spectrum obtained in step 1, obtain the signal after U block spread spectrum;
[0116] Step 3, adding the U-channel block-spread signals obtained in step 2 into guard interval processing respectively, obtaining the processed U-channel signal, and transmitting to the channel through the transmitting antenna;
[0117] Receiving process:
[0118]Step 4, u...
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