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Communication system, communication method, and computer storage medium

A technology of a communication system and a communication method, which is applied in the field of communication systems and computer storage media, can solve problems such as the inability to demodulate millimeter wave signals, and achieve the effects of improving the sensitivity of received signals, improving the stability of signal frequencies, and eliminating frequency difference intermodulation

Pending Publication Date: 2021-12-17
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] A communication system, a communication method, and a computer storage medium provided by the embodiments of the present invention solve the problem of how to avoid frequency difference intermodulation and thus lead to the inability to correctly demodulate the received millimeter wave signal

Method used

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  • Communication system, communication method, and computer storage medium
  • Communication system, communication method, and computer storage medium
  • Communication system, communication method, and computer storage medium

Examples

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Embodiment 1

[0027] In the related art, there is frequency difference intermodulation caused by reverse leakage of the modulator chip in each millimeter-wave communication unit as the receiving end, which leads to the failure to correctly demodulate the received millimeter-wave signal. See for example figure 1 βcosω in 1 t, where β is the reverse leakage coefficient of the modem, once the modem chip is produced, the reverse leakage coefficient is constant. Reverse leakage signal βcosω 1 t is mixed with the normal signal s(t), resulting in frequency difference intermodulation. For example, in Figure 1, the IQ modulator at the transmitting end converts a and b to output a normal signal s(t)=acosω 0 t-bsinω 0 t; at the receiving end of the communication system, since the reverse leakage is doped into the s(t) signal, the I1 signal obtained by demodulating the I-way signal (wherein the demodulation process of the Q1-way, I2-way and Q2-way is similar, in This will not be repeated) as an ex...

Embodiment 2

[0056] For ease of understanding, this embodiment will be described below based on the communication system architecture shown in the above-mentioned embodiments, taking the communication method of the communication system as an example. See Figure 5 As shown, the process includes:

[0057] S501: Recognize the application scene, perform pairing according to the recognition result, and complete the synchronization of the reference frequency.

[0058] For example, carry out hot backup application scenarios, cross-polarization cancellation application scenarios, 2*2MIMO or 4*4 MIMOx identification of millimeter wave communication systems, and then perform corresponding pairing of millimeter wave communication units in the communication system according to the identification results; and then follow the above method Complete the synchronization of the base frequency.

[0059] S502: Perform tracking and switching of the synchronization of the reference frequency.

[0060] For exa...

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Abstract

The embodiment of the invention provides a communication system, a communication method and a computer storage medium. The communication system comprises at least two millimeter wave communication units, one of the millimeter wave communication units is a reference millimeter wave communication unit, a frequency synchronization channel is established between the reference millimeter wave communication unit and other millimeter wave communication units, and a reference frequency is transmitted to other millimeter wave communication units through the frequency synchronization channel; and each millimeter wave communication unit demodulates the received millimeter wave signal through the corresponding radio frequency module based on the reference frequency, so that frequency difference cross modulation caused by reverse leakage is eliminated, the situation that the received millimeter wave signal cannot be correctly demodulated due to the frequency difference cross modulation is avoided, the signal frequency stability is improved, and the signal receiving sensitivity is improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a communication system, a communication method and a computer storage medium. Background technique [0002] Millimeter wave communication is an important topic of 5G technology, and it is mainly used in 5G large-capacity fronthaul / backhaul. The millimeter wave communication system is applied at a higher carrier frequency, and a larger symbol rate is used in the transmission process to transmit a larger amount of information. [0003] There are superheterodyne schemes and quadrature IQ modulation and demodulation schemes in millimeter wave communication implementation schemes. The superheterodyne scheme requires multi-stage frequency conversion, and the circuit complexity is relatively high. In the field of millimeter wave communication, especially the millimeter wave full outdoor equipment, there are high requirements for receiving signals, so the circuit design is also relativ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/401H04B7/0413H04W56/00H04L7/033
CPCH04B1/401H04B7/0413H04W56/0035H04L7/033H04W56/00H04B1/40
Inventor 樊鹏
Owner ZTE CORP
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