Analog Rotating Ring Decoder for an LDPC Convolutional Code

نویسندگان

  • Andrew Schaefer
  • Matthias Moerz
  • Joachim Hagenauer
  • Arvind Sridharan
  • Daniel J. Costello
چکیده

We present an analog rotating ring decoder for decoding an LDPC convolutional code. The decoder architecture uses a window of soft received L-values K time units in the past and K time units in the future to decode a given bit. The window of 2K + 1 time units is arranged in a ring structure, and decoding proceeds in a continuous fashion by rotating around the ring. Simulation results indicate performance almost identical to that achieved with digital decoding.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

On the Enhancement of LDPC Codes Used in WiMAX

In this paper the low density party check (LDPC) codes used in the IEEE 802.16 standard physical layer are studied, and two novel techniques to enhance the performance of such codes are introduced. In the first technique, a novel parity check matrix for LDPC codes over GF(4) with the non-zero entries chosen to maximize the entropy is proposed, the parity check matrix is based on the binary pari...

متن کامل

A Programmable Decoder for LDPC Convolutional Codes: From Graph Properties to Hardware Realization

This contribution aims at unveiling the properties of the Tanner graphs underlying LDPC convolutional codes that can be used for efficient decoder implementations. We will also shown an implementation example of a simple programmable architecture that was obtained applying these graph properties.

متن کامل

Design of Generalized LDPC Codes and their Decoders

We first consider the design of generalized LPDC (G-LDPC) codes with recursive systematic convolutional (RSC) constraint nodes in place of the standard single parity check constraint nodes. Because rate-1/2 RSC nodes lead to low-rate G-LDPC codes, we consider high-rate tail-biting RSC nodes for which Riedel’s APP-decoder based on the reciprocal-dual code trellis becomes necessary. We present th...

متن کامل

On Generalized LDPC Codes and Their Decoders

We first consider the design of generalized LPDC (G-LDPC) codes with recursive systematic convolutional (RSC) constraint nodes in place of the standard single parity-check constraint nodes. Because rate-1/2 RSC nodes lead to low-rate G-LDPC codes, we consider high-rate tail-biting RSC nodes for which Riedel’s APP-decoder based on the reciprocal-dual code trellis becomes necessary. We then consi...

متن کامل

A Flexible LDPC/Turbo Decoder Architecture

Low-density parity-check (LDPC) codes and convolutional Turbo codes are two of the most powerful error correcting codes that are widely used in modern communication systems. In a multi-mode baseband receiver, both LDPC and Turbo decoders may be required. However, the different decoding approaches for LDPC and Turbo codes usually lead to different hardware architectures. In this paper we propose...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003