Interference elimination method and device
A technology of interference elimination and interference data, which is applied in the field of communication, can solve the problems of frequency offset sensitivity and small carrier, and achieve the effect of low complexity and improved interference removal performance
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Embodiment 1
[0035] Figure 1B It is a schematic flowchart of an interference elimination method provided in Embodiment 1 of the present invention. This embodiment is applicable to a communication network architecture composed of a data sending end and a data receiving end, wherein the data sending end can send data to the data receiving end through a transmission channel. The method provided in this embodiment may be executed by an interference elimination device provided on a data receiving end, and the device is implemented by software and / or hardware. In the communication network architecture, the data sending end needs to use DPSK (Differential Phase Shift Keying, Differential Phase Shift Keying) or MDPSK technology to modulate the sent data, and the data receiving end can use the interference elimination device provided by this embodiment to detect the data transmitted during the transmission process. The interference caused is eliminated to demodulate the data sent by the data send...
Embodiment 2
[0057] figure 2 It is a schematic flowchart of an interference elimination method provided in Embodiment 2 of the present invention. In this embodiment, on the basis of the first embodiment above, operation 120 and operation 130 are further optimized. see figure 2 , the interference elimination method provided in this embodiment specifically includes the following operations:
[0058] Operation 210. Acquire the time-domain sample sequence input this time, and perform time-frequency conversion on the time-domain sample sequence to obtain a frequency-domain sample sequence.
[0059] Operation 220, copy the frequency-domain sample sequence into two paths, namely the first frequency-domain sample sequence and the second frequency-domain sample sequence.
[0060] Operation 230: Process the first frequency-domain sample sequence to obtain a third frequency-domain sample sequence, so that the third frequency-domain sample sequence satisfies the conditions for performing a filter...
Embodiment 3
[0070] image 3 It is a schematic flowchart of an interference elimination method provided in Embodiment 3 of the present invention. In this embodiment, on the basis of the first and second embodiments above, an operation of predetermining filter coefficients is added. see image 3 , the interference elimination method provided in this embodiment specifically includes the following operations:
[0071] Operation 310, setting initial values of each filter coefficient in the filter.
[0072] Operation 320, acquire the time-domain sample sequence corresponding to the preset training symbol obtained by the data receiving end in the training phase, as the time-domain sample sequence input this time.
[0073] In this embodiment, the initial values of each filter coefficient in the filter may be set to 0, or set randomly. The data sending end sequentially sends modulation signals corresponding to multiple training symbols, and the data receiving end sequentially receives each...
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