Terminal frequency deviation detection method, device and system

Abstract

The embodiment of the invention provides terminal frequency deviation detection method, device and system. The method comprises the following steps of: scrambling a downlink signal of a to-be-detected voice business channel corresponding to a to-be-detected terminal through a self-adapting quadrature phase shift keying modulation technique; carrying out frequency deviation detection on a scrambled uplink signal on the to-be-detected voice business channel to obtain the frequency deviation detection result of the uplink signal on the to-be-detected voice business channel; and sending the frequency deviation detection result to a base station controller. In the embodiment of the invention, a base station transceiver scrambles the downlink signal of the to-be-detected voice business channel and then carries out the frequency deviation detection on the scrambled uplink signal on the to-be-detected voice business channel, and therefore, the frequency deviation detection result of the uplink signal of the to-be-detected voice business channel can be obtained when the downlink signal of the to-be-detected voice business channel is multiplexed.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to a terminal frequency offset detection method, device and system. Background technique [0002] VAMOS (Voice services over Adaptive Multi-user Channels on One Slot) technology is a Global System for Mobile Communications (Global System for Mobile Communications, hereinafter referred to as: GSM) standard that improves voice service capacity technology. VAMOS technology can multiplex voice services corresponding to two voice users on a half-rate or full-rate wireless channel. [0003] When the existing GSM terminals are performing voice services, the VAMOS technology can multiplex the voice services of two GSM terminals in the same cell onto the same service channel, thus improving the GSM capacity. [0004] However, when the GSM terminal receives the voice service signal multiplexed by the VAMOS downlink AQPSK modulation technology, the voice s...

AI Technical Summary

Problems solved by technology

[0004] When the GSM terminal receives the voice service signal multiplexed by the VAMOS downlink AQPSK modulation technology, the voice service signal of the GSM terminal is multiplexed by another GSM Terminal voice service signal interference

Especially when the interference signal is stronger than the effective voice service signal, the downlink automatic frequency correction (Automatic Frequency Correction, hereinafter referred to as: AFC) function of certain types of GSM terminals may be abnormal, resulting in abnormal downlink frequency offset, which in turn leads to poor voice quality or disconnected issues

However, there is a lack of means in the prior art to detect terminals with abnormal frequency offsets during VAMOS multiplexing

Images