P. Robertson and T. Worz, "Bandwidth-efficient turbo trellis-coded modulation using punctured component codes," IEEE J. Select. Areas Commun. , vol. 16, pp. 201--218, Feb. 1998.  Home/Search   Document Not in Database   Summary   Related Articles   Check

.... fading channels [13] where the parallel transitions provide no protection from fading) low rate trellis codes (such as those in [14] where the relatively small number of trellis branches makes parallel transitions unnecessary, constituent encoders for symbol interleaved parallel concatenation [15] [17] where parallel transitions cause poor decoder performance) and space time codes [18] 19] where parallel transitions violate the rank criterion) In these situations SP labeling is not clearly motivated, and edge profile superior labelings can provide an advantage. Simple code design ....

....be the proper labeling strategy for cross constellations whenever parallel branches must be avoided. Some example applications include trellis codes for fading channels [13] trellis codes that protect against periodic erasures [14] space time codes [18] 19] and symbol interleaved turbo codes [15] [17] Generally, the results of this paper apply directly to linear encoders that map binary symbols to one of the standard 2 D constellations. Care must be taken when applying our results to bit interleaved coded modulation (BICM) with or without concatenation and iterative decoding. With ....

P. Robertson and T. Worz, "Bandwidth-efficient turbo trellis-coded modulation using punctured component codes," IEEE J. Select. Areas Commun., vol. 16, pp. 206--218, Feb. 1998.

....satellite and therefore it is desirable to make the users bandwidth efficient. Thus bandwidth efficient schemes employing joint turbo coding and multidimensional signal constellations, such as turbo trellis coded modulation, are ideally suited for the satellite channel [84] 85] 86] 87] [88]. While a certain amount of latency is acceptable for the satellite channel l, latency is more of an issue than with the deep space chanel. Thus it is desirable to have moderate block size turbo codes with a reasonable number of decoder iterations. The application of turbo codes to satellite ....

P. Robertson and T. WSrz, "Bandwidth-efficient turbo trellis-coded modulation using punctured component codes," IEEE J. Select. Areas Commun., vol. 16, pp. 206-218, Feb. 1998.

....of rate k n, k p 1. The k binary inputs are one symbol over the extension field GF(2k) Two main approaches are proposed in the literature for the turbo encoder structure, one employing bit interleaving by Benedetto et al. 1] and the other employing symbol interleaving by Robertson and WSrz [2] [3]. For bit interleaving, k bit interleavers are used to keep the bit streams separate. The first constituent encoder in [1] for k even, has half of the k input bits as systematic outputs and a parity output. The second constituent encoder is the same as the first, but the other half of the k ....

....in [1] for k even, has half of the k input bits as systematic outputs and a parity output. The second constituent encoder is the same as the first, but the other half of the k input bits become systematic. Thus the overall turbo encoder is systematic. For symbol interleaving as described in [2] [3], to have the overall turbo encoder sys tematic, the interleaver maps even symbol positions to even symbol positions and odd ones to odd. The output of the second encoder is de interleaved and the output symbols from each encoder are punctured alternatively. The odd to odd and even to even ....

P. Robertson and T. Worz, "Bandwidth-efficient turbo trellis-coded modulation using punctured component codes," IEEE Journal in Selected Areas in Communications, vol. 16, pp. 206-218, February 1998.

....Department of Electrical and Computer Science, University of Southampton, SO17 1BJ, U.K. e mail: lh ecs.soton.ac.uk, http: wwwmobile. ecs.soton.ac.uk) Publisher Item Identifier S 0018 9545(00)10962 4. by Battail [8] Le Goff et al. 10] Wachsmann and Huber [11] as well as Robertson and Worz [12] suggested to use the codes in conjunction with bandwidth efficient modulation schemes. Further advances in understanding the excellent preformance of the codes are due, for example, to Benedetto and Montorsi [13] 15] Perez et al. 14] Hagenauer et al. 16] 17] extend the concept to use ....

P. Robertson and T. Worz, "Bandwidth-efficient turbo trellis-coded modulation using punctured component codes," IEEE J. Select. Areas Commun., vol. 16, pp. 206--218, Feb. 1998.

.... Coded Modulation (TCM) 1] which is based on combining the functions of coding and modulation, is a bandwidth efficient scheme that has been widely recognized as an excellent error control technique suitable for applications in mobile communications [2, 3] Turbo Trellis Coded Modulation (TTCM) [4] is a more recent channel coding scheme that has a structure similar to that of the family of power efficient binary turbo codes [5] but employs TCM codes as component codes. TCM and TTCM schemes invoked Set Partitioning (SP) based modulated symbol labeling, in order to achieve an increased ....

....four encoders, each adding one parity bit to each information symbol, yielding the coding rate of 1#2 in conjunction with the modulation mode of 4QAM, 2#3 for 8PSK, 3#4 for 16QAM and 5#6 for 64QAM. The TCM scheme invokes Ungerboeck s codes [1] while the TTCM scheme invokes Robertson s codes [4]. The BICM scheme was constructed using Paaske s convolutional codes [15] The rate 5#6 code of the BICM scheme was constructed using Paaske s rate 1#2 code and puncturing, following the approach of [16, 17] Soft decision trellis decoding utilizing the Log Maximum A Posteriori (Log MAP) algorithm ....

P. Robertson and T. Worz, "Bandwidth efficient turbo trellis-coded modulation using punctured component codes," vol. 16, pp. 206--218, February 1998.

....constellations by inserting an extra bit interleaver before Gray coding of bits to symbols; at the receiver, bit wise iterative decoding is performed after symbol to bits log likelihood ratio (LLR) computation. True TTCM for the AWGN channel (with Ungerboeck style component codes) is considered in [10, 11], where symbol wise interleaving between two PCCCs is employed, with puncturing of every other output symbol from the parallel encoders. Bit interleaved PCCC TCM is introduced in [12] where half of the input bits are punctured in each encoder before bits to symbol mapping. The three foregoing ....

P. Robertson and T. Woerz, "Bandwidth-efficient turbo trellis-coded modulation using punctured component codes," IEEE Jour. on Sel. Areas in Commun., vol. 16, no. 2, pp. 206-218, Feb. 1998.

....turbo TCM transmitter and receiver are more complicated to implement than the much simpler 16QAM scheme with the rate 1 2 turbo decoder proposed in [39] 15 TTCM structures have also been proposed in [36] They offer improvements over conventional TCM techniques. The same authors investigated in [40] TTCM schemes for 8PSK, 16QAM and 64QAM modulation schemes with varying overall bandwidth efficiencies. The simulation results are only for BER higher than 10 6 and show an error floor that can not be lowered below the 10 6 threshold. 4 Interleaving The interleaver design is a key ....

P. Robertson and T. Woerz, "Bandwidth--efficient turbo trellis--coded modulation using punctured component codes", IEEE Journal on Selected Areas in Communications, vol.16, no. 2, pp. 206--218, Feb. 1998.

....of further uncoded levels. In order to conclude this section the similarities and differences between MLC and TCM are briefly discussed: ffl Turbo TCM schemes perform similarly over the AWGN channel as the presented MLC schemes with turbo component codes at comparable complexity and coding delay [58], 59] The main difference is that in MLC binary turbo codes are the building blocks of the entire scheme, whereas in turbo TCM the component TCM schemes are building blocks of the turbo scheme. ffl The usual TCM schemes and MLC with convolutional component codes perform similarly, but with a ....

P. Robertson and T. Worz, "Bandwidth--Efficient Turbo Trellis--Coded Modulation Using Punctured ComponentCodes," IEEE J. Select. Areas Commun., vol. vol.SAC-16, pp. 206--218, Feb. 1998.

No context found.

P. Robertson and T. Worz, "Bandwidth-efficient turbo trellis-coded modulation using punctured component codes," IEEE J. Select. Areas Commun. , vol. 16, pp. 201--218, Feb. 1998.

No context found.

P. Robertson and T. Wrz, "Bandwidth-efficient turbo trellis-coded modulation using punctured component codes," IEEE J. Select. Areas Commun., vol. 16, pp. 206--218, Feb. 1998.

No context found.

P. Robertson and T. W orz. Bandwidth-efficient Turbo Trellis-Coded Modulation using punctured component codes. IEEE J. Select. Areas Commun., 16(2):206--218, February 1998.

No context found.

P. Robertson and T. Worz (1998). Bandwidth-efficient turbo trellis-coded modulation using punctured component codes. IEEE J. Selected Areas in Communications 1692): 206--218.

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