Since DVBRCS applications involve the transmission of data using various block sizes and coding rates, the coding scheme has to be very flexible, with better performance than the classical concatenation of a convolutional code and a Reed-Solomon code (Douillard et al.
The turbo codes are based on Partial Unit Memory Codes, which may be constructed with higher free distance than equivalent recursive systematic convolutional codes and can achieve better performance than the latter.
The Viterbi algorithm (VA) is known as a maximum likelihood (ML)-decoding algorithm for convolutional codes
Hagenauer, Rate-compatible punctured convolutional codes
(RCPC codes) and their applications, IEEE Trans.
The same convolutional code
of rate 1/2 and constraint length 7 is used as in the ETSI and DAVIC specifications.
Mittelholzer, 1996, Convolutional Codes
Over Groups, IEEE Transactions on Information Theory, 42(6), pp.
Comtech AHA's products include the AHA4540, a single chip Turbo Product Code encoder/decoder that achieves up to 155 Mbps throughput and up to 2-4 dB improvement over conventional FEC schemes, such as Reed-Solomon or convolutional codes
The MSM6050 chipset supports data rates of up to 153 kbps in both the forward and reverse links simultaneously, with both turbo and convolutional codes
Turbo Code Support: Allows Turbo codes or convolutional codes
to be selected on a per-user basis; .
Topics he will highlight include orthogonal codes, convolutional codes
, and physcial layer of IS-95, Wideband CDMA and Bluetooth, among many others.
11b standard, Packet Binary Convolutional Codes
Complementary Punctured-Pair Convolutional Codes
(CPPC), which optimally combines digital information, and