Zte Corporation

Fanping Du

Junyi Yang

Qiang Li

Yu Wei Chen

Jian Mg Cheng

Ning Qiu

Xuehong Tian

Wenqi Zeng

Jianping Tao

Lihong Liang

Jiwen Wang

Haifeng Ni

Min Bi

Xiaolong Ran

Xiaoming Zhu

A method, device and system for complex carrier modulation are provided in the disclosure, wherein eor eis used as a carrier frequency to perform carrier modulation on a to-be-carried signal. The modulated signal transmitted in a medium is a rotating complex signal. The method can enable right and left frequency bands to carry independent information. Therefore the spectrum utility ratio is improved. Employing the method for complex carrier modulation provided in the disclosure can use the right and left frequency spectrum resources adequately, and the loss of signal energy is small, therefore the capacity of a channel is improved greatly.

Method, device and system for complex carrier modulation

The disclosure provides a channel decoding method and a tail biting convolutional decoder. The method comprises: the tail biting convolutional decoder performs add-compare-select processing on metric values of 2states according to input data to be decoded and N zeros input after the data to obtain final cumulative metric values of the 2states, and stores selection result of add-compare-select processing, wherein N is the constraint length of tail biting convolutional coding; the tail biting convolutional decoder starts to backtrack from one state of the 2states according to the selection result to obtain intermediate decoding result after the add-compare-select processing is finished; the tail biting convolutional decoder outputs the bits except the last N bits of the intermediate decoding result as decoded result of the data to be decoded. The tail biting convolutional decoder comprises an add-compare-select module, a backtracking module and an outputting module.

Channel decoding method and tail biting convolutional decoder

A method for configuring a service and a method and apparatus for rate matching in a TD-SCDMA system, this method for configuring the service includes: taking that a check bit puncturing ratio should be more than 7i+a or less than 7i&#x2212;a as a newly added constraint condition, and the check bit puncturing ratios of each configured service being outside a range of [7i+a, 7i&#x2212;a], the method for rate matching includes: when puncturing each path of check bits of the current data block, if a difference between a position Pof kreserved check bit calculated according to a method defined by the service and a previously determined position NPof k&#x2212;1reserved check bit is a positive integral multiple of 7, determining a position NPof kreserved check bit as Pplus 1 or Pminus 1, and Pplus 1 and Pminus 1 requiring carrying out alternately.

Method and apparatus for service configuration and rate matching of time division-synchronous code division multiple access system

A method and apparatus for rate matching are disclosed by the invention, wherein the method includes: determining an initial value according to the total amount of data in the data stream and a predetermined initial offset value; performing an accumulation processing and an even distribution processing on said initial value and the amount of the data needing rate matching; determining the data needing rate matching from the data stream according to the processing result. With the solution proposed by the invention, a rate matching method using even distribution principle and accumulation principle can be determined. The method is simple, clear and accurate, and can be understood easily.

Method and apparatus for rate matching

A method and device for complex carrier demodulation are provided by the disclosure. The method includes: demodulating modulated signals using complex signals eor eas carrier signals to obtain complex carrier demodulation signals. Therefore, the utilization rate of spectrums is improved. With the method for complex carrier demodulation provided by the disclosure, the left and right frequency spectrum resources are fully utilized, the loss of signal energy is little, thereby the channel capacity is improved greatly.

Method and device for demodulating complex carriers

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Shenzhen, China

Fanping Du