Fast turbo-code encoder
OwnerYeun-Renn Ting, Erl-Huei Lu +2inventors
InventorsYeun-Renn Ting, Erl-Huei Lu, Kuang-Shyr Wu, Hsien-Yu Chu
Life of this patent
Estimating the term…
Abstract
The present invention provides a fast turbo-code encoder. The advantage of the encoding device is the encoding data is output via less exclusive-or (XOR) gate operations. The structure of the fast turbo-code encoding directly applies the exclusive-or operation on the input data and the internal value of the register, the encoding output is obtained via less exclusive-or gate time. Thus, the device of the present invention saves half of the gate time comparing to the conventional structure.
Claims4
A turbo-code fast encoding device, the device is suitable for the communication system, the device is suitable for outputting parity information after the encoding process on a turbo-code of the sequential input, wherein, the input bit sequence of the turbo-code is represented as d=(d1, d2, . . . , dk, . . . ,dN), where the dk is the input bit of the turbo-code fast encoding device at time k, k is from 1 to N, and N is the segment length, wherein, the turbo-code fast encoding device comprises:
- a first recursive systematic convolution (RSC) encoder;
- and
- a second recursive systematic convolution (RSC) encoder, wherein, the first recursive systematic convolution (RSC) encoder and the second recursive systematic convolution (RSC) encoder comply to
- 16 y k = d k + ∑ i = 1 M g di a k - i
- Wherein, dk is the input bit of the turbo-code fast encoding device at time k, yk is the parity information corresponding to dk, gdi is the parameter that is generated by a first encoder feed-forward generator, the element is either 0 or 1, whereas, ak-i is generated by ith register at time k.
Dependencies are inferred from the claim text.