Method and device for time slot alignment in narrowband wireless digital communication
A time slot and wireless technology, applied in the field of time slot alignment in narrowband wireless digital communication, can solve problems such as time slot value error, poor signal quality, unaligned uplink and downlink time slots, etc., to avoid error of time slot value and improve accuracy Effect
Active Publication Date: 2020-04-21
深圳科立讯通信有限公司
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[0005] Based on this, it is necessary to provide a method for effectively avoiding errors in time slot values and effectively improving time Gap Alignment Accuracy Method
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[0035] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.
[0036] In one embodiment, such as figure 2 As shown, a method for narrowband wireless digital communication time slot alignment comprises the following steps:
[0037] Step S100: Receive several access channel type bits from several consecutive downlink time slots, and form the several access channel type bits into a time slot value sequence in the order of receiving.
[0038] In this step, the mobile station continuously receives signals of several d...
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The present invention relates to a narrow-band wireless digital communication time-slot alignment method and device. The method comprises: receiving a plurality of access channel type bits through a plurality of continuous downlink time slots, and forming a time slot value sequence according to the a plurality of received access channel type bits; arranging a first presetting sequence and a second presetting sequence, wherein the downlink time slot of the first presetting sequence alignment is a first time slot, and the downlink time slot of the second presetting sequence alignment is a second time slot; and comparing the time slot sequence with the first presetting sequence and the second presetting sequence to obtain a first syndrome and a second syndrome, wherein when the weight of the first syndrome is smaller than the weight of the second syndrome, setting the current downlink time slot to be the first time slot, and when the weight of the first syndrome is larger than the weight of the second syndrome, setting the current downlink time slot to be the second time slot. The narrow-band wireless digital communication time-slot alignment method and device are configured to compare the time slot value sequence with the first presetting sequence and the second presetting sequence to determine the time slot of the downlink time slot alignment so as to effectively improve the accuracy of the time slot alignment.
Description
technical field [0001] The invention relates to the technical field of narrowband wireless digital communication, in particular to a method and device for time slot alignment of narrowband wireless digital communication. Background technique [0002] In the DMR (Digital Mobile Radio, digital mobile radio) / PDT (Professional Digital Trunking, digital trunking) digital mobile communication system, the TDMA (Time division multiple access, time division multiple access) method with two time slots is used, and the radio frequency carrier bandwidth It is a 12.5kHz FDMA (Frequency division multiple access, frequency division multiple access) technology. Since two time slots are used, in order to avoid mutual interference of the two time slots, the alignment of the time slots is very important. [0003] In digital communication, uplink refers to the transmission of signals from the mobile station to the base station, and downlink refers to the transmission of signals from the base s...
Claims
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IPC IPC(8): H04W24/02H04W72/04
CPCH04W24/02H04W72/0446
Inventor 赖镜灵宋洋军付文良
Owner 深圳科立讯通信有限公司