Method, system and device for improving demodulation performance of public indication channel
An indicator channel and indicator signal technology, applied in the field of wireless network communication, can solve the problems of inability to improve system performance, poor demodulation performance of common indicator channels, and public indicator channels affecting performance, etc., to reduce power, reduce interference, The effect of increasing the capacity
Inactive Publication Date: 2010-08-18
HUAWEI TECH CO LTD
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[0008] In the above method for the UE to receive the indicator signal, since the constant false alarm method is used to generate the judgment threshold value, and the occurrence probability of the false alarm is only related to the noise threshold, the existing judgment threshold value is not an optimal one. Threshold value, which will cause misjudgment of the indicator signal, and ultimately make the demodulation performance of the common indicator channel poor
The demodulation performance of the common indicator channel will affect the performance of the system. For example, the network side hopes to achieve reasonable power allocation by increasing or reducing the power offset of the common indicator channel. For applications with high cost, even if the network side increases or decreases the power offset of the common indicator channel, the probability of false alarms at this time is the same as that of the common indicator channel at the original power offset. Therefore, the purpose of improving system performance cannot be achieved.
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[0052] In the existing technical solutions, since the receiving end such as the user equipment does not know the power offset information of the indication signal sent by the transmitting end such as the base station to the user equipment through the common indicator channel, it does not know the common indicator channel received by it. Therefore, the position of sqrt(E) (the square root of E) in Fig. 2 cannot be determined. In this way, the user equipment demodulates the threshold value of the indicator signal of the common indicator channel, and the power deviation of the common indicator channel The setting information is irrelevant, that is, the threshold value of the indicator signal decision is the same no matter when the power offset of the common indicator channel is high or when the power offset of the common indicator channel is low.
[0053] In the (a) and (b) diagrams of Figure 2, the area of the dark gray shaded part represents the size of the false alarm probabi...
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The invention provides a method, a system and a device for improving the performance of public indicating channel demodulation. The sender transmits power bias imformation of public indicating channel to the receiver which decides threshold value of demodulation indicating signal according to the received power bias information and demodulates indicating signal of public indicating channel according to the threshold value and reference channel. In the invention, the threshold value of indicating signal of public indicating channel demodulation is related with the power of the public indicating channel, that is to say the threshold value decided by the indicating signal raises and decreases along with the power bias of public indicating channel so that the receiver can produce optimum threshold value decided by the indicating signal by power bias information of the indicating signal and can accurately demodulate the indicating information loaded in the public indicating channel to minimize the price for the indicating signal miscarriage and improve demodulating performance of the public indicating channel.
Description
technical field [0001] The present invention relates to the technical field of wireless network communication, in particular to a method, system, transmitter and user equipment for improving demodulation performance of a common indicator channel. Background technique [0002] In the third-generation mobile communication WCDMA (Wideband Code division multiple access, wideband code division multiple access) system, there are several common indicates the channel. Since the NodeB needs to send the indication signal to multiple different UEs (user equipments) on a specific public indication channel, before the indication signal is sent, it is generally extended with a signature sequence, and different signature sequences are kept positive at the transmitting end. In order to distinguish users, for example, in the current WCDMA standard protocol version, it is stipulated that RGCH (RelativeGrant Channel, Relative Grant Channel) and HICH (Hybrid ARQ Indicator Channel, Hybrid Autom...
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IPC IPC(8): H04B7/005
Inventor 莫知伟吴更石刘宇
Owner HUAWEI TECH CO LTD