Sampling deviation detecting method and device
A sampling deviation and detection method technology, applied in the field of communication, can solve problems such as inability to solve multipath interference, inability to accurately detect sampling deviation, etc., and achieve the effect of good recovery
Active Publication Date: 2013-03-13
HONOR DEVICE CO LTD
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[0005] However, the above method of detecting sampling deviation directly uses the descrambled and despreaded multipath information to perform interference cancellation, and the descrambled and despreaded multipath information is not the real multipath information, but the multipath information interfered by ISI , using interfered multipath information for interference cancellation cannot solve the multipath interference with close intervals, for example: multipath interference within one chip, therefore, the existing methods for detecting sampling deviation cannot accurately detect the presence of Sampling Deviation in Multiple Paths
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[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0024] figure 1 It is a flowchart of an embodiment of the detection method of sampling deviation of the present invention, as figure 1 As shown, the detection method of the sampling deviation may include:
[0025] Step 101 , descrambling and despreading the pilot symbols of the pilot channel, performing multipath search on the pilot channel...
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The embodiment of the invention provides sampling deviation detecting method and device. The sampling deviation detecting method comprises the following steps of: decrambing and despreading pilot frequency symbols of a pilot frequency channel, searching the pilot frequency channel in a multi-path way according to the descrambled and despreaded relevant value, and then obtaining the relevant value of each descrambled and despreaded path; carrying out multi-path interference elimination on the relevant value of the descrambled and despreaded path, and eliminating the interference of each auxiliary path with the front and rear chip positions of the main path by utilizing the relevant vale of each auxiliary path subjected to the multi-path interference elimination; and detecting the sampling deviation according to the relevant value of the front and rear chip positions of the main path subjected to the interference elimination to obtain the sampling deviation evaluating value. The invention can accurately detect the sampling deviation when multiple paths exist in one chip.
Description
technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to a sampling deviation detection method and device. Background technique [0002] The wireless transmission channel environment of Wideband Code Division Multiple Access (WCDMA) system can be described as a frequency selective channel, and multipath channels with different delays will cause Inter-Symbol Interference (Inter-Symbol Interference; hereinafter referred to as: ISI) and inter-symbol interference (Inter-Chip Interference; hereinafter referred to as: ICI), the WCDMA receiver is usually a Rake receiver or an equalizer receiver. As an enhanced evolution technology of WCDMA, High Speed Downlink Packet Access (High Speed Downlink Packet Access; hereinafter referred to as: HSDPA) provides the high-speed data rate required to realize multimedia services in the third-generation mobile communication system, greatly improving the The spectrum...
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IPC IPC(8): H04L25/03H04B1/7113
Inventor 关文康花梦吴更石
Owner HONOR DEVICE CO LTD