Method for sending information and method and apparatus for receiving information

Abstract

This invention discloses a method for sending and receiving information and a device, in which, said device includes: a channel estimation unit, a channel correcting unit, a demodulation and information hard decision unit, a channel obtaining unit and a time slot delay unit, the method for sending information includes: designing an up power control unit including the pilot information of the first K time slots and the control information including power control order words of the latter time slots L and the K and L are positive integrals and the sending end sends the up power control information unit, the method for receiving information includes: the pilot information of the first K time slots of the receiving end carries out channel estimation, channel correction to the current time slot control information, demodulation and hard decision to get the actual control information and channel information of the current time slot then carrying out channel estimation based on the acquired channel information after delaying for a time slot.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a method for sending uplink power control information based on coherent detection and a method and device for receiving uplink power control information based on coherent detection. Background technique [0002] In cellular systems, fast power control is an important factor to improve service quality of traffic. In order to realize fast power control, the uplink power control information sent by the cellular system includes: pilot information Pilot and control information including the power control command word TPC. The TPC in the control information is used to carry the power control command sent by the terminal to the base station, and the control information sometimes includes some control information other than the TPC, and the control information is an effective Information; pilot information Pilot is used for coherent detection power control command word TPC, and...

AI Technical Summary

Problems solved by technology

However, in the prior art, the pilot information Pilot occupies a large number of bits in the uplink power control information, so that the actual effective information TPC domain can only occupy a small number of bits

In this way, in order to meet the system-specific TPC error performance requirements, the sender needs to use higher transmit power to send uplink power control information, thereby increasing the self-interference of the system and reducing the capacity of the system

In addition, in the prior art, the period of power control is fixed as time slots, that is, the transmitting end continuously sends uplink power control information, while the receiving end does not need to continuously transmit uplink power control information in some specific application scenarios, such as slow moving application scenarios. The uplink power control information is received, therefore, the transmission resources of the system are wasted, and the performance of the system is reduced

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