Frame synchronization system and method for shortening total time length of calibration and synchronization

Abstract

The invention discloses a frame synchronization system and method for shortening the total calibration and synchronization time. The system comprises a delay module, a calibration execution module, a judgment module, a shift register array and a correlation operation module. Demodulation data output by the demodulation module is divided into two paths, one path directly enters the calibration execution module, and the other path enters the calibration execution module through the time delay module. A delay module is added before correlation operation, and a certain length of delay is carried out on part of received data. The data of the delay part does not take effect in the correlation operation immediately, and the time length of the delay is used for the calibration process, so that the total time length of the calibration process and the synchronization process is shortened. Relative to the time point at which effective data arrives, the time point at which the receiver is opened in advance is properly delayed, which is equivalent to shortening the working time of the receiver. According to the system adopting the frame synchronization method provided by the invention in the same time, the total working duration of the receiver is shortened, and the dynamic power consumption of the receiver can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a frame synchronization system and method for shortening the total duration of calibration and synchronization. Background technique [0002] Today, with the rapid development of wireless communication technology, the performance of communication systems is improving day by day, which inevitably puts forward higher requirements for the performance of radio frequency chips. In order to achieve better receiving performance, the radio frequency receiver must complete one or more calibrations in a very short time before receiving useful signals, such as gain control (AGC), frequency offset calibration (frequency offset cancellation), DC calibration ( dc offset cancellation), etc. These calibrations must be performed every time you enter the receiving mode. Each calibration takes a certain amount of time to complete, and in order to avoid the interference between the two ...

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Problems solved by technology

In order to achieve better receiving performance, the radio frequency receiver must complete one or more calibrations in a very short time before receiving useful signals, such as gain control (AGC), frequency offset calibration (frequency offset cancellation), DC calibration ( dc offset cancellation), etc. These calibrations must be performed every time you enter the receiving mode. Each calibration takes a certain amount of time to complete, and in order to avoid the interference between the two calibration processes and cause errors in the calibration results, they cannot be completed at the same time. , in order not to affect the reception of valid data, you can only choose to enter the receiving mode in advance or shorten the calibration time as much as possible. The former will increase the overall power consumption, while the latter will reduce the accuracy of calibration

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