Frequency hopping method and device for OFDM communication system

Abstract

The invention provides a frequency hopping method for an OFDM (Orthogonal Frequency Division Multiplexing) communication system, a transmitting end at least comprises a first transmitting antenna Sm and a second transmitting antenna Sn, a receiving end at least comprises a first receiving antenna Rm and a second receiving antenna Rn, and the method comprises the following steps: the transmitting and receiving ends communicate through a transmitting end antenna Sm and a receiving end antenna Rm, reside at a source frequency f1 according to atlas indication, and is used for sending and receiving data; at a preset advanced access moment, an antenna Sn of a sending end and an antenna Rn of a receiving end respectively execute advanced access operation, data sending and receiving are carried out at a frequency f2, an antenna Sn of a to-be-sent end and the antenna Rn of the receiving end finish frequency access operation, and f2 frequency residence is respectively started; and the antenna Sm and the antenna Rm stop data transmission at the end of the frequency hopping period T. Based on the embodiment of the invention, the frequency conversion time delay can be reduced or even eliminated, zero-time-delay hopping to a new frequency at the frequency hopping moment is realized, and the communication performance of the system is improved while the anti-interference capability of the system is guaranteed.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a frequency hopping system, device and method based on dual connectivity in an OFDM communication system. Background technique [0002] Ultra-high-definition and other video services put forward high-speed transmission requirements for wireless communication systems. In order to meet this service requirement, broadband OFDM technology can be applied in wireless communication systems. OFDM is a multi-carrier modulation transmission method. After the serial data stream is serial-to-parallel converted to form multiple parallel sub-data streams, it uses multiple orthogonal sub-carriers for parallel transmission. Due to the orthogonality between subcarriers, there is no need to place guard bands between subcarriers, and OFDM technology can achieve higher spectrum efficiency on limited spectrum resources. At the same time, OFDM technology has good bandwidt...

AI Technical Summary

Problems solved by technology

Therefore, the actual transmission data rate in the frequency hopping channel is higher than the original data rate, resulting in a decrease in the bit signal-to-noise ratio (under the same signal power and channel conditions), an increase in the transmission bit error rate, and a lower frequency hopping rate that can be supported

Coupled with frequency hopping synchronization error, bit synchronization error, channel machine tuning error, receiver frequency point sensitivity error, etc., it causes the inherent loss of frequency hopping processing, or the frequency hopping signal is damaged during processing, making it impossible to Under the condition of interference and the same power, the frequency hopping communication distance is generally about 1 / 5 shorter than the fixed frequency communication distance

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