A device, system and method for estimating and correcting IQ imbalance
A technology of balance correction and equipment, which is applied in the field of IQ imbalance estimation and correction, and can solve the problems of frequency domain estimation and correction of IQ imbalance, poor correction results, and reduced system performance.
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Embodiment 1
[0203] figure 1 It is a schematic structural diagram of Embodiment 1 of a receiver device of the present invention, the device includes:
[0204] The demodulation module 101 is configured to perform orthogonal demodulation on the received training sequence sent by the transmitting end device.
[0205] The sequence generation module of the sending end device generates a training sequence, the training sequence is as figure 2 As shown, the training sequence includes M sections of training subsequences S (n); the length of each section of training subsequences S (n) is K, and the phase difference between two adjacent training subsequences is Each training subsequence S (n) includes two data frames; each data frame includes a cyclic prefix and a carrier signal, and the cyclic prefix CP of the two data frames 1 and CP 2 Same, the carrier signal of each data frame includes D subcarriers; the carrier signal s of the preceding data frame 1 The subcarrier of the positive frequenc...
Embodiment 2
[0295] Figure 5 It is a schematic structural diagram of Embodiment 2 of a transmitting end device according to the present invention, and the device includes:
[0296] A sequence generation module 501, configured to generate a training sequence.
[0297] The training sequence generated by the sequence generation module 501 in the sending end device is as follows figure 2 As shown, it is the training sequence demodulated by the receiver device in Embodiment 1, and the angle between two adjacent training subsequences is The phase shift of , the length of each training subsequence is K, and there are M training subsequences S(n) in the training sequence. Each training subsequence consists of two data frames, the cyclic prefix CP of the two data frames 1 and CP 2 Same, the carrier signal s of the two data frames 1 (n) and s 2 (n) is set to figure 2 format shown, the carrier signal of the preceding data frame s 1 The subcarrier of the positive frequency of (n) is a non-...
Embodiment 3
[0306] Figure 6 It is a schematic structural diagram of a system for estimating and correcting IQ imbalance in the present invention, and the system includes:
[0307] The receiver device 601 described in Embodiment 1 and the sender device 602 described in Embodiment 2.
[0308] In specific implementation, the system can be:
[0309] Both the sending end device 602 and the receiving end device 601 are base stations;
[0310] or,
[0311] The sending end device 602 is a base station, and the receiving end device 601 is a mobile terminal;
[0312] or,
[0313] The sending end device 602 is a mobile terminal, and the receiving end device 601 is a base station.
[0314] Optionally, the system can also be applied inside the transceiver to estimate and correct the transmitting IQ imbalance and receiving IQ imbalance within the transceiver itself.
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