Suboptimum detection of trellis-coded CPM for transmission on bandwidth- and power-limited channels

Abrishamkar, F.; Biglieri, E.

doi:10.1109/26.87212

Cited by 24 publications

(4 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was shown in [20] that is time-invariant and can be synthesized as a differential encoder with arithmetic operations in the ring of integers modulo . That is, where is given by (6) where denotes modulo-addition. It was also shown in [20] that for , is a memoryless mapper that maps on to any one of the possible CPM signals from the CPM signal set .…”

Section: Cpm Modulator As Recursive Inner Codementioning

confidence: 99%

Performance of trellis-coded CPM with iterative demodulation and decoding

Narayanan

Stuber

2001

IEEE Trans. Commun.

View full text Add to dashboard Cite

Interleaved trellis-coded systems with full response continuous-phase modulation (CPM) are considered. Upper bounds on the bit-error rate performance are derived for coherent detection on the additive white Gaussian noise and flat Rayleigh fading channels by considering the trellis code, interleaver, and CPM modulator as a serially concatenated convolutional code. A coherent receiver that performs iterative demodulation and decoding is shown to provide good bit error performance. Finally, a noncoherent iterative receiver is proposed and is shown to perform close to the coherent iterative receiver. I. INTRODUCTION M ANY communication systems employ nonlinear power amplifiers and, hence, require a low peak-to-average power ratio for the modulated signal. Examples of such systems include satellite and mobile communications systems. Continuous-phase modulation (CPM) is a constant envelope modulation technique and, hence, a good choice for such systems. Trellis-coded modulation (TCM) is a technique that combines modulation and coding in order to achieve coding gains without sacrificing data rate or bandwidth. When TCM is combined with CPM, high power and bandwidth efficiency can be achieved. Convolutionally encoded CPM on additive white Gaussian noise (AWGN) channels has been considered by many researchers [1]-[3]. Upper bounds on the bit-error rate (BER) have been derived for such systems [1], [3]. A detailed analysis of the distance spectrum and BER has been considered in [4]. The design and analysis of trellis-coded CPM (TCCPM) schemes for AWGN channels has also been considered in [5]. However, none of the aforementioned work has considered the use of an interleaver between the trellis code and the CPM modulator for AWGN channels. Similarly, they have also ignored the effect of the recursive nature of CPM modulator in designing TCCPM schemes. The performance of TCCPM for fading channels has been evaluated in [6]-[9]. A fading channel typically exhibits correlation in time and, when the correlation is high, the channel Paper approved by A. Ahlen, the Editor for Modulation and Signal Design of the IEEE Communications Society.

show abstract

Section: Cpm Modulator As Recursive Inner Codementioning

confidence: 99%

Performance of trellis-coded CPM with iterative demodulation and decoding

Narayanan

Stuber

2001

IEEE Trans. Commun.

View full text Add to dashboard Cite

show abstract

“…This can be done either by the use of balanced modulating pulses, i.e. pulses fulfilling the condition: (7) or by ensuring that a running digital sum (RDS(W) of modulating data…”

Section: ( N -1 ) T < F < N Tmentioning

confidence: 99%

“…It is simple to prove that neither unipolar nor polar binary uncorrelated data can satisfy the condition (7). This can be only achieved by a premodulation encoding when a balanced line code is employed.…”

Section: ( N -1 ) T < F < N Tmentioning

confidence: 99%

See 1 more Smart Citation

Generalized chirp modulation technique

Wysocki¹

1995

Trans Emerging Tel Tech

View full text Add to dashboard Cite

Chirp modulation is one of the proposed digital phase modulation schemes where positive and negative data are represented, respectively, by increasing and decreasing of the instantaneous frequency. Chirp modulation is resistive to Doppler effect while its error performance, due to the phase characteristics, is quite poor. The paper deals with a generalization of the Chirp technique leading to new classes of signal formats for digital communications with improved spectral efficiency and good error performance. To achieve this task, the second time derivative of an information carrying phase component of a modulated signal is set to be proportional to an information carrying data signal. Further, for a generation of specific signal formats, the alternate mark inversion encoding of data to be transmitted is applied.

show abstract

On the availability of trellis decoding schemes for continuous phase FSK signals employing limiter discriminator detection

Iwanami

1993

Electron Comm Jpn Pt III

View full text Add to dashboard Cite

Although a trellis‐coded modulation scheme has been applied to multilevel PSK or QAM signals, its application for the continuous‐phase FSK (CPFSK) with the limiter‐discriminator detection has not been investigated well and the coding gain associated with it has not been obvious yet. In this paper, using a linear approximation, we have designed modulation parameters of this scheme. We have also executed the exact computer simulation and made clear the problem to obtain the actual coding gain as well as to increase them. Furthermore, utilizing the intersymbol interference caused by the IF filter, which greatly deteriorates the bit error rate (BER) performance in this scheme, we have proposed a sequence estimation scheme using the Viterbi algorithm. In this scheme, the sending signals are those of the binary continuous phase FSK. Through computer simulations, we have made clear that large improvements of BER really exist. The sequence estimation scheme is considered to work better than the trellis encoded scheme when considering the BER performance and the complexity of transmitter and receiver.

show abstract

Suboptimum detection of trellis-coded CPM for transmission on bandwidth- and power-limited channels

Cited by 24 publications

References 13 publications

Performance of trellis-coded CPM with iterative demodulation and decoding

Performance of trellis-coded CPM with iterative demodulation and decoding

Generalized chirp modulation technique

On the availability of trellis decoding schemes for continuous phase FSK signals employing limiter discriminator detection

Contact Info

Product

Resources

About