An efficient encoding architecture for IEEE e LDPC codes with multiple code lengths and code rates are implemented. In our design, change between different code rate or code length only to change the type in information data. This architecture is also suitable the IEEE n standard. Our encoder achieve higher throughput and better Reverse Engineering: WiMAX and IEEE e A Thesis Presented to the Graduate School of Clemson University In Partial Ful llment of the Requirements for the Degree Master of Science Electrical Engineering by Katherine C. Cameron May Accepted by: Dr. Richard Brooks, Committee Chair Dr. Kuang-Ching Wang Dr. Ian Walker standard, e has been proposed by Institute of Electrical and Electronic Engineers (IEEE). (WiMAX) provides specifications for both fixed Line of sight (LOS) communication in the range of GHz (c), and fixed, portable, Non-LOS communication in the range of GHz (a, d). Also it defines wireless
e thesis scalability | psychonsilifpaliberkscalinronki
Approaching Shannon limit. LDPC code is adopted by various standards e. DVB-S2, In systematic block codes, the information bits directly exist in the bits of codeword. Issues with LDPC codes The size of G is very large. G is not generally sparse. Encoding complexity will be very high. Structured LDPC Codes Quasi-Cyclic LDPC Codes In QC-LDPC, H can be partitioned into square sub-blocks of size z x z.
Each sub-blocks can be Z x Z zero sub-block or identity matrix with permutation. Structured LDPC Codes QC Codes With Dual-Diagonal Structure In IEEE standards QC-LDPC Codes have Dual-Diagonal parity structure.
We take In H, the part T is a low triangle matrix. General Encoding for LDPC Codes Richardson and Urbanke RU algorithm. Matrix will be modify by parity portion of weight-3 A Q U column set. H can be sectorized into three sub matrices The information bit region A The parity bit region Q. for non bit-flipping. Replace with zero cyclic shift [1] C.
Yoon, E, 802 16e thesis. Choi, M. Cheong, and S. Lee, "Arbitrary bit generation and correction technique for encoding QC-LDPC codes with dual-diagonal parity structure," IEEE Wireless Communications and Networking Conference, WCNCpp.
Can directly applicable to matrices defined in IEEE standards without any modification. Lin, C. Wei, and M. Ku, "Efficient Encoding for Dual-Diagonal Structured LDPC Code Based on Parity bits Prediction and Correction," IEEE Asia Pacific Conference on Circuits and Systems APPCCASpp. Better Encoding Scheme Step 1 Set P0 as any binary vector Correct prediction vector by f Step 2 Compute lambda value by doing matrix operation Hs.
Reduce encoding delay!! Step 2 Two-way derivation Compute lambda value by doing matrix operation Hs. Step 7 Correct prediction parity by adding f. divider Prediction Matrix Parity Accumulator Correct memory. Benefit: In this stage, matrix 1. When the input data select the shift values is coming, it can work and multiply specific immediately without all value according to the input data are the code length.
Reduce the numbers of barrel shifter. Shifter Value Computation Equation for computing shift value. Slice FFs LUTs CLK Total gate. Divide the datas from This module used to save matrix, 802 16e thesis. the input data. These data are used in barrel shifters. Parallel architecture Stage 3.
According to the Computed the lambda position, in lambda value by this clock cycle 1, 2, accumulating the 5, 8, 9, 11 need to be shifted data after Kb accumulated. clock cycle. Parallel architecture Stage 6. Step2: Step1: Correct the other Pi, 802 16e thesis. Compute the P0. divider Matrix Predict Correct memory Barrel shifter 2. As the stage1 in 1 In the first Kb clock parallel architecture. Reason: In the last clock cycle, 1.
Reduce the slice 3. Divide the datas from Choose the corresponding matrix. In normal, this module In this module, there accumulate the shifted are three works: data to compute i. Compute i When the data is the 2. Compute Pi last value in this row, 3. Compute P0 also compute Pi. Serial architecture Stage 4. Serial architecture Stage 5. Correct the other Pi.
The proposed encoder based on IEEE The hardware implementation was performed and verification on Xilinx Virtex-4 and Altera Stratix Field Programmable Gate Array 802 16e thesis device.
Z N Slice FFs LUTs CLK MHz IT Gbps IT Gbps IT Gbps IT Gbps. Information throughput ranging from 2. For a given code rate, an increase in the code length will increase the throughput. Implementation Results Serial architecture, 802 16e thesis. Information throughput ranging from 0. Implementation Results Parallel architecture using row by row. Compare to Related Work We compare implementation with [3], 802 16e thesis. Better throughput for longer code length Using less area to implement multiple code length and code rate The clock cycle is shorter the [3], 802 16e thesis.
Kopparthi and D. Gruenbacher, "Implementation of a fiexible encoder for structured low-density parity-check codes," IEEE Pacic Rim Conference on Communications, Computers and Signal Processing PacRimpp.
802 16e thesis to Related Work The comparison of throughput. The throughput in our proposed encoder is higher then [2] in all code rate and code length The proposed 802 16e thesis outperforms the work in [2] in terms of throughput ratio by 1. The proposed encoder outperforms the work in [2] in terms of throughput ratio by 802 16e thesis. Slices FFs LUTs Block rams CLK IT.
Proposed 12, 3, 22, 802 16e thesis, 0 In our proposed encoder, the matrix information are built in it without additional blockrams. An efficient encoding architecture for IEEE In our design, change between different code rate or code length only to change the type in information data. Thank you!! Open navigation menu. Close suggestions Search Search. en Change Language close menu Language English selected español português Deutsch français Русский italiano Română Bahasa Indonesia Learn more.
User Settings. close menu 802 16e thesis to Scribd! Skip carousel. Carousel Previous. Carousel Next. What is Scribd? Books Audiobooks Magazines Podcasts Sheet Music Documents selected Snapshots.
Thesis v1. Uploaded by Anonymous cjzDyR6. Document Information click to 802 16e thesis document information Description: An efficient FPGA implementation. Copyright © © All Rights Reserved. Available Formats PPT, PDF, TXT or read online from Scribd, 802 16e thesis. Share this document Share or Embed Document Sharing Options Share on Facebook, opens a new window Facebook. Did you find this document useful? Is this content inappropriate?
Report this Document. Description: An efficient FPGA implementation. Copyright: © All Rights Reserved. Available Formats Download as PPT, PDF, TXT or read online from Scribd.
WiMax 802.16 (IEEE 802.16)
, time: 6:05
adopted€IEEE€€OFDM€PHY€layer€for€the€equipment€manufacturer due€ to€ its€ robust€ performance€ in€ multipath€ environment.€ The€ thesis investigates€ the€ simulation€ performance€ of€ IEEE€ € OFDM€ PHYCited by: 51 targets on fixed and nomadic accesses. In IEEE e amendment, the IEEE e system (also is called Mobile WiMAX) further provides functions to facilitate mobile accesses. In its original release the standard addressed applications in licensed bands in the 10 to 66 GHz frequency range The thesis deals with the static analysis of the IEEE e PKMv2 Protocol. The thesis consists of a summary report and source codes for the experimented protocols. Lyngby, February Ender Yuksel
No comments:
Post a Comment