Frequency hopping method and device for ofdm communication system

Abstract

The present invention proposes a frequency hopping method for an OFDM communication system, wherein the transmitting end includes at least a first transmitting antenna Sm and a second transmitting antenna Sn, and the receiving end includes at least a first receiving antenna Rm and a second receiving antenna Rn, the The method includes: the transmitting and receiving end communicates through the antenna Sm of the transmitting end and the antenna Rm of the receiving end, and stays at the source frequency f1 according to the map indication for data transmission and reception; Antennas Rn perform early access operations respectively, and perform data transmission and reception at frequency f2, and antenna Sn at the transmitting end and antenna Rn at the receiving end complete frequency access operations, and start to reside at frequency f2 respectively; antenna Sm and antenna Rm are in frequency hopping Data transmission stops at the end of period T. Based on the embodiments of the present invention, the frequency switching delay can be reduced or even eliminated, and zero-delay jumping to a new frequency can be realized at the moment of frequency hopping, thereby improving the system communication performance while ensuring the anti-interference ability of the system.

Description

technical field [0001] The present application relates to the field of wireless communication technologies, and in particular, to a dual-connection-based frequency hopping system, device, and method in an OFDM communication system. Background technique [0002] Video services such as ultra-high definition have 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 converted into multiple parallel sub-data streams through serial-to-parallel conversion, multiple sub-carriers that are orthogonal to each other are used for parallel transmission. Due to the orthogonality between sub-carriers, guard bands do not need to be placed between sub-carriers, and OFDM technology can achieve higher spectral efficiency on limited spectrum resources. At the ...

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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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