Method for error modeling on basis of TDD cellular network transmitting terminal channel state information
A technology of channel state information and error modeling, which is applied in the direction of communication channel monitoring, transmission monitoring, electrical components, etc., can solve problems such as inability to reflect the impact, and achieve the effect of improving accuracy
Inactive Publication Date: 2015-07-08
SHANGHAI JIAOTONG UNIV
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In terms of pilot interference modeling of adjacent cells, the models in the current technology simply assume that the interference power is proportional to the expected signal power
This simplified assumption cannot reflect the influence of environmental parameters and system design parameters on the interference of neighboring cells.
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[0053] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0054] The invention provides an error modeling method for channel state information (CSIT) of a transmitter in a cellular network under a time division duplex (TDD) mechanism. The following factors are considered in the modeling process: the delay caused by the pilot transmission period, the noise in the pilot channel, and the adjacent cell interference in the pilot channel. The analysis method comprises the steps of: determining the parametric expression of adjacent cell interference in the pilo...
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The invention provides a method for error modeling on the basis of TDD cellular network transmitting terminal channel state information. Factors including delay caused by pilot frequency transmitting cycle, noise in a pilot channel and interference of adjacent cells in the pilot channel are considered in the modeling process. The method comprises the steps of determining parametric expression of the interference of the adjacent cells in the pilot channel; utilizing an interference expression to determine a CSIT error expression according to pilot frequency synchronization conditions and channel shielding conditions; and determining met conditions through the CSIT error expression when some factor becomes a leading factor in influencing CSIT precision. The parametric expression of CSIT errors is given, and according the method can be applied to a network planning stage to predict CSIT error conditions under a given designing scheme.
Description
technical field [0001] The present invention relates to a method in the technical field of wireless cellular networks, in particular to an error modeling method for channel state information at a transmitter in a cellular network based on Time Division Duplex (TDD, Time Division Duplexing). Background technique [0002] In a multi-user MIMO system, Channel State Information at the Transmitter (CSIT, Channel State Information at the Transmitter) plays an important role in system performance. Accurate modeling of CSIT error conditions can provide a basis for subsequent system performance analysis and precoding algorithm design. In a time-division duplex-based cellular network, a user (UE) periodically sends an uplink pilot signal, and the base station obtains CSIT by estimating the pilot signal of the user in the cell. In the estimation process, the CSIT error is mainly caused by the following factors: because the transmission of the pilot is periodic, there is a delay betwee...
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IPC IPC(8): H04B17/30H04B17/391
Inventor 袭奇何晨蒋铃鸽
Owner SHANGHAI JIAOTONG UNIV