Method and device for multi-cell channel estimation based on reference signal
A reference signal and channel estimation technology, applied in the direction of multi-frequency code system, baseband system components, etc., can solve the problems of cell channel performance degradation, etc., and achieve the effect of reducing computational complexity, dimensionality, and complexity
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Embodiment 1
[0085] see image 3 , an embodiment of a reference signal-based multi-cell channel estimation method provided by an embodiment of the present invention may include:
[0086] S31, estimating the timing delay difference between the interfering cell and the local cell, and obtaining the timing delay difference di;
[0087] S32. Generate a local reference signal of each cell, and perform phase compensation on the local reference signal by using the timing delay difference;
[0088] Specifically, the phase compensation performed on the local reference signal is as follows:
[0089]
[0090] in, Denotes the local reference signal RS of cell i after phase compensation, S i (k) represents the local reference signal RS symbol at position k in the frequency domain, d i is the timing delay difference between the cell and cell i estimated in step S31, L represents the number of fast Fourier transform (FFT) transform points used during OFDM modulation, and j is the unit imaginary r...
Embodiment 2
[0118] Specifically, in step S33, the determination of the S and R signal vectors is related to the channel correlation bandwidth. Therefore, another embodiment of a multi-cell channel estimation method based on a reference signal provided by an embodiment of the present invention further includes, before performing multi-cell joint channel estimation and obtaining channel response values at reference signal positions of the own cell and the interfering cell, Perform channel correlation bandwidth estimation, use the channel correlation bandwidth estimation to obtain the relevant bandwidth range, and obtain the phase-compensated reference signal within the relevant bandwidth range, refer to Image 6 , including the following steps:
[0119] S31, estimating the timing delay difference between the interfering cell and the local cell, and obtaining the timing delay difference;
[0120] S32. Generate a local reference signal of each cell, and use the timing delay difference to o...
Embodiment 3
[0148] see Figure 8 , the reference signal-based multi-cell channel estimation device provided by the embodiment of the present invention includes:
[0149] The timing delay difference acquisition module 81 is used to estimate the timing delay difference between the interfering cell and the own cell, and obtain the timing delay difference;
[0150] A phase compensation module 82, configured to generate a local reference signal of each cell, and use the timing delay difference to perform phase compensation on the local reference signal;
[0151] The channel estimation module 83 is configured to use the phase-compensated local reference signal to perform multi-cell joint channel estimation, and obtain channel response values at the reference signal positions of the local cell and the interfering cell.
[0152] As can be seen from the above, in this embodiment, the timing delay difference between different cells arriving at the receiver signal is considered, and the phase com...
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