A Synchronization Scheme Based on Decoder Soft Outputs of Ldpc Codes over Hf Channels
نویسنده
چکیده
A frame synchronization scheme based on decoder soft outputs of low-density parity-check codes over high frequency channels is considered. In a coded orthogonal frequency division multiplexing based system, low-density parity-check code decoder soft outputs are exploited in order to perform frame synchronization. The decoder soft outputs are observed for several candidate frame start positions in order to determine the accurate frame boundaries and to provide an excellent system performance. The simulation results show that the system gives the best bit error rate performance at the frame synchronization point in which the decoder soft output values reach the maximum over high frequency channels.
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 کاملSpace-Time Coded OFDM for High Data rate Wireless Communication over Wideband Channels
Assume a STC (space-time codes) OFDM (orthogonal frequency-division multiplexing) scheme the receiver antennas and multiple transmitters on compared time-chosen fading channels and frequency. It has been displayed that the time-selectivity product array is the input parameter to describe the associated fading channel outage capacity. It is considered that space-time codes with huge efficient ex...
متن کاملLow-Density Parity-Check Codes for Data Storage and
For high density magnetic recording channels and memory systems, low-density parity-check (LDPC) codes with probabilistic decoding are replacing Reed-Solomon (RS) codes or Bose-Chaudhuri-Hocquenghem (BCH) codes with conventional algebraic decoding. The main benefit of LDPC codes over the RS and BCH codes is that LDPC codes can provide lower error probabilities than equivalent conventional codes...
متن کاملA Design Of Low Density Parity Check Algorithm For Insertion/Deletion Channels
Low-density parity-check (LDPC) code is a linear error correcting code, a method of transmitting a message over a noisy transmission channel, and is constructed using a sparse bipartite graph. LDPC codes are capacityapproaching codes, LDPC codes are finding increasing use in applications requiring reliable and highly efficient information transfer over bandwidth or return channel–constrained li...
متن کاملSerial Concatenation and Joint Iterative Decoding of LDPC Codes and Reed-Solomon Codes
In this paper, a serial concatenation scheme and its iterative decoding algorithm between Low Density Parity Check codes (LDPC) and Reed-Solomon codes are proposed. For the decoder, the soft output values delivered by LDPC are used as reliability values to perform the Chase decoding of Reed-Solomon (RS) codes which return soft information to LDPC decoder. This approach presents an option scheme...
متن کامل