OFDM signal receiving and dispatching method and apparatus

Abstract

The present invention relates to a mobile communication field, disclosing an orthogonal frequency division multiplexing signal receiving method and device, having a good antijamming capability when transferring the ACK information. Signal sequences[s1 and s2]are arranged at the transmitting end according to the value of the waiting signal, the s1 and the s2 are respectively multiplied by an orthogonal frequency spreading code and then being added, and then sending to the receiver in the OFDM mode; a corresponding mode used for receiving and de-spreading is arranged at the receiver. If the signal sequences set for the different dereferences of the waiting signal by the sender are directly crossed with each other, the receiver has a relative treatment to the signal sequence after multiplying, and then gets the waiting signal from the sender; if the phase displacements between the two signal sequences s1 and s2 set for the different dereferences of the waiting signal by the sender are different, the receiver gets the waiting signal from the sender through the style of phase detection.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to Orthogonal Frequency Division Multiplexing ("OFDM") technology. Background technique [0002] There are many forms of information to be transmitted in the communication system, such as voice, text, symbols and images and so on. In order to transmit and exchange information, it is necessary to convert the transmitted information into electrical signals. Usually, an electrical signal expresses information by one of its parameters. For example, the signal voltage changes with the strength of the voice, which is to represent the information with the signal amplitude. [0003] According to the value method of the signal parameter and the relationship between it and information, the signal can be divided into two categories: analog signal and digital signal. Furthermore, according to whether an analog signal or a digital signal is transmitted in the communication system, ...

AI Technical Summary

Problems solved by technology

At present, the network side uses the method of energy detection to judge whether the DFT matrix column vector has been received in the sub-resource block. Since it is difficult to determine the threshold value of the detection threshold in the case of wireless fading, once the ACK / NACK is in the transmission process When interference is received, the network side may not be able to correctly determine whether it is received ACK information or NACK information, resulting in misjudgment of ACK / NACK information

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