P. Jung, M. Nahan, and J. Blanz, "Application of turbo-codes to a CDMA mobile radio system using joint detection and antenna diversity, " Proc. IEEE Conf. Veh. Technol., pp. 770--774, 1994.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....block codes. Jung and Nahan [36] 34] characterized the coded performance under the constraints of short transmission frame length, which is characteristic of speech systems. In collaboration with Blanz, they also applied turbo codes to a CDMA system using joint detection and antenna diversity [39]. Barbulescu and Pietrobon addressed the issues of interleaver design [31] Due to space limitations here we have to curtail listing the range of further contributors in the field, without whose advances this contribution could not have been written. In this paper, we build on a previous tutorial ....

....interleaver can be seen in Fig. 22. This shows a comparison between turbo coders using several block interleavers with frame lengths of approximately 190 b. The block interleaver, proposed for short frame transmission systems in [37] and used by the same authors in other papers such as [34] 38] [39], clearly has a somewhat lower performance than the other block interleavers, which use an odd number of rows and columns. It is also interesting to note that of the two block interleavers with an odd number of rows and columns, the interleaver which is closer to being square (i.e. the ....

P. Jung, M. Nahan, and J. Blanz, "Application of turbo-codes to a CDMA mobile radio system using joint detection and antenna diversity, " Proc. IEEE Conf. Veh. Technol., pp. 770--774, 1994.

....codes (PCCC) Further to this paper, work has been done by Benedetto et al. 15 17] on serial concatenated convolutional codes (SCCC) Several authors have proposed using turbo codes for DS CDMA systems [5, 6] These papers discuss system implementations but show no performance results. In [7], turbo code decoders are used as single user decoders to a DS CDMA multi user system. In this paper we concatenate the MAP derived multi user receiver and soft in soft out single user trellis decoders to produce a type of serial concatenated convolutional code. The proposed structure differs from ....

P. Jung, M. Nahan, and J. Blanz, "Application of turbo--codes to a CDMA mobile radio system using joint detection and antenna diversity," in IEEE 44th Vehicular Technology Conference, (Stockholm, Sweden), pp. 770--774, June 1994.

.... negligible 27 in the case of short frame transmission (192 bits) However for a slightly larger block size (399 bits) the interleaver type can be optimised to double the performance of the turbo code [39] The application of turbo codes to a TDMA CDMA mobile radio system was investigated in [40]. Gains of 0.4 to 1.2 dB over non systematic convolutional codes can be achieved by using turbo codes for the considered mobile radio system using joint detection with coherent receiver antenna diversity. Bad urban and typical urban models specified by COST 207 [42] were used. The complexity of ....

P. Jung, M. Na#han and J. Blanz, "Application of turbo--codes to a CDMA mobile radio system using joint detection and antenna diversity," 1994 IEEE 44th Vehicular Technology Conference, Stockholm, Sweden, pp. 770--774, June 1994.

....the ability to detect this symbol suffers in both encoders and hence the entire system. It is also important to note that 183 symbols corresponds to 549 bits per packet. For PCS systems, packets using less than 549 bits are possible which means that termination may become important in these cases [16]. 49 4.3 Parallel Transitions Sections 2.3 and 3.3 discussed the rationale for the use of encoders with parallel transitions as constituent encoders in a T TCM system. Figures 4.9, 4.10 and 4.11 show simulations results for T TCM systems that utilize parallel transitions. 5 5.5 6 6.5 7 7.5 8 ....

P. Jung et al., "Application of turbo-codes to a cdma mobile radio system using joint detection and antenna diversity," in Proceedings of the IEEE 44th Annual Vehicular Technology Conference, pp. 770--774, 1994.

....users becomes large, compared to the sequence length. Keywords Code Division Multiple Access channels, sum capacity, random sequences, multiaccess I. Introduction The study of code division multiple access (CDMA) systems with error control coding has been limited to a few publications e.g. [1, 2, 3, 4]. In general the approach has been to use a multiuser device to supply metrics to soft input single user Viterbi decoders. Optimal coded CDMA systems require in addition to the design of good spreading sequences, joint encoding decoding strategies. The selection of optimal sequence multisets for ....

P. Jung, M. Naßhan, and J. Blanz, "Application of turbo-- codes to a CDMA mobile radio system using joint detection and antenna diversity," IEEE Trans. Veh. Technol., 1996. to appear.

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