Multilevel coded CPFSK systems for AWGN and fading channels

Altunbaş, İbrahim; Aygölü, Ümit

doi:10.1109/26.843189

Cited by 3 publications

(3 citation statements)

References 27 publications

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“…Joint two-level turbo code and 4CPFSK scheme with random interleaver size N = 1024, generator sequence (37, 21) in octal form, and overall rate 2/3 was simulated for AWGN, Rician (Rician fading parameter K = 10 dB) and Rayleigh channels. Then, the proposed 2LTC-4CPFSK scheme was compared to the known existing multilevel schemes using CPFSK showed in [8,9], called ref-1 and ref-2, respectively. The code on reference one (ref-1) is The proposed 2LTC-CPFSK method was also compared with the bandwidth efficient TTCM scheme, which is shown in Figure 7.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…The initial and ending physical tilted phases are 0 and π as shown in Figure 5. At the receiver, 4CPFSK signal constellation partitioning is optimized to provide low BER for AWGN and fading channels as in [9]. The signal set partitioning technique for 2LTC-4CPFSK signals is as follows: depending on the estimated output bit of the firstlevel turbo decoder is whether…”

Section: The Design Of Multilevel Turbo Encoder Using Cpfskmentioning

confidence: 99%

“…CPE-related schemes have better BER performance than systems using the traditional approach for a given number of trellis states due to larger Euclidean distances. When the decomposed structure of CPM is considered, joint trellis coded and CPM, and joint multilevel convolutional code and CPM systems can be designed as in [8,9]. For achieving a low bit error rate (BER) over a severe ISI channel, the double decision feedback equalization is designed for MLTC-CPFSK system [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Joint Multilevel Turbo Equalization and Continuous Phase Frequency Shift Keying

Bayat

Odabasioglu

Osman

et al. 2009

J Wireless Com Network

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A novel type of turbo coded modulation scheme, called multilevel turbo coded-continuous phase frequency shift keying (MLTC-CPFSK), is designed to improve the overall bit error rate (BER) and bandwidth efficiency. Then, this scheme is combined with a new double decision feedback equalizer (DDFE) to remove the interference and to enhance BER performance for the intersymbol interference (ISI) channels. The entire communication scheme is called multilevel turbo equalization-continuous phase frequency shift keying (MLTEQ-CPFSK). In these schemes, parallel input data sequences are encoded using the multilevel scheme and mapped to CPFSK signals to obtain a powerful code with phase continuity over the air. The performances of both MLTC-CPFSK and MLTEQ-CPFSK systems were simulated over nonfrequency and frequency-selective channels, respectively. The superiority of the two level turbo codes with 4CPFSK modulation is shown against the trellis-coded 4CPFSK, multilevel convolutional coded 4CPFSK, and TTCM schemes. Finally, the bit error rate curve of MLTEQ-CPFSK system over Proakis B channel is depicted and ISI cancellation performance of DDFE equalizer is shown against linear and decision feedback equalizers

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Section: Simulation Resultsmentioning

confidence: 99%

Section: The Design Of Multilevel Turbo Encoder Using Cpfskmentioning

confidence: 99%