Performance of coherent data transmission in frequency-selective Rayleigh fading channels

Dzung, Dacfey; Braun, W. R.

doi:10.1109/26.237852

Cited by 13 publications

(6 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The channel is modelled as a discrete frequency-selective slowly fading channel [4,12,13]. Wide sense stationary uncorrelated scattering (WSSUS) is assumed in the frequency-selective channel [4,13].…”

Section: Channel Simulation Modelmentioning

confidence: 99%

See 1 more Smart Citation

<title>MC-CDMA with frequency domain diversity reception for sectored indoor wireless cellular networks</title>

Sibanda¹,

Dlodlo²

2001

SPIE Proceedings

View full text Add to dashboard Cite

A Monte Carlo simulation was conducted to assess the performance of Multi-Carrier Code Division Multiple Access (MC-CDMA) in a sectored cell, in an indoor environment. In each sector, terminals schedule packet transmission using slottedp-persistent Inhibit Sense Multiple Access (ISMA), while the packets themselves are transmitted using MC-CDMA. The simulated bit error rate performance of MC-CDMA with combining strategies maximal ratio combining (MRC) and equal gain combining (EGC) used in the frequency domain are presented. A comparison is made between analytically determined bit error probability for a single user in an additive white Gaussian noise channel using binary phase shift keying (BPSK), and simulated bit error rate for a single user using MC-CDMA with MRC and EGC. The determination of the number of sectors in a cell is also given. MC-CDMA with diversity combining outperforms BPSK in a non-fading AWGN channel. Further, as the user-number increases, EGC performs better than MRC if these combining strategies are used with MC-CDMA. Finally, the results show the basis for determining the number of sectors in a cell. When using slottedp-persistent ISMA, it is envisaged that only a single user will transmit at a time in a sector.

show abstract

Section: Channel Simulation Modelmentioning

confidence: 99%

“…Wide sense stationary uncorrelated scattering (WSSUS) is assumed in the frequency-selective channel [4,13]. The frequency selectivity of the channel implies that there are L resolvable signal components or signal paths between each user and the receive antenna.…”

Section: Channel Simulation Modelmentioning

confidence: 99%

<title>MC-CDMA with frequency domain diversity reception for sectored indoor wireless cellular networks</title>

Sibanda¹,

Dlodlo²

2001

SPIE Proceedings

View full text Add to dashboard Cite

show abstract

“…However, when the transmission rate becomes high, mobile radio channels are typically subjected to frequency selective fading, which results in the severe inter symbol interference (ISI) and the degradation of the system performance [1][2].Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier-based technique for mitigating ISI to improve capacity in the wireless system with spectral efficiency. Meanwhile, MultipleInput Multi-Output (MIMO) systems have rising attention of the wireless academic community and industry because their promise to increase capacity and performance proportionally with the number of antennas.…”

Section: Introductionmentioning

confidence: 99%

“…Ct Bt l, with n E {1, N, I}, I Ez {l, ,L}(2) In Scheme-II, the MRC-ARQ[8][9] is used per antenna. In this scheme, the antenna subscription n is not changed but subcarrier subscription.…”

mentioning

confidence: 99%

Space-Time-Frequency Diversity Hybrid ARQ for MIMO-OFDM Systems

Liu¹,

Chen²

2006

2006 10th IEEE Singapore International Conference on Communication Systems

View full text Add to dashboard Cite

MIMO-OFDM is a promising technology for supporting high data rate communication. Meanwhile, HARQ is known as an effective method to ensure highly reliable communications. The challenges on HARQ for MIMO-OFDM systems lie on coping with multidimensional resource and large feedback. In this paper, one spacetime-frequency diversity HARQ is proposed to explore the multidimensional resource efficiently. Moreover, its subcarrier grouping scheme is proposed to reduce the feedback information size. Simulation results demonstrate that compared with the conventional HARQ schemes, the proposed schemes show lower packet error rate and higher throughput on the same condition of feedback information size.

show abstract

“…Therefore, the MLSE decoder has t o be extended t o accommodate the additional channel ISI. Several studies have been found for uncodecl CPM on IS1 channels Dzung and Braun [4] described an MLSE receiver that is matched t o the overall channel impulse response, however, the receiver requires a bank of (adaptive) filters to account for all possible CPM signals. Cheung and Steele [5] proposed a soft-decision feedback equalizer (SDFE) that allows for incorrect symbol decisions to be exchanged for reducing the error propagation.…”

Section: L[ntroductionmentioning

confidence: 99%

MLSE and soft-output equalization for trellis-coded continuous phase modulation

Yiin¹,

Stuber

Proceedings of ICC/SUPERCOMM '96 - International Conference on Communications

View full text Add to dashboard Cite

This paper presents two equalizer structures for TC-CPM on multipath fading IS1 channels. An equivalent discrete-time model is developed by combining the tappeddelay-line model of the frequency-selective channel and by oversampling at the receiver. The fractionally-spaced MLSE equalizer performs C P M demodulation, TCM decoding, and channel equalization by exploiting the finite state nature of the ISI-corrupted TC-CI'M signal. Both simulation and analytical results show diversity-like improvement when performing joint MLSE decoding and equalization. For the interleaved soft-output equalizer, the soft symbol metric is delivered to the TCM decoder by using a forward and a backward recursion algorithm. Three variants of the soft-output equalizer are examined. We conclude that the backward recursion is essential to partial-respomse CPM schemes, and with moderate complexity, the soft-output equalizer can have substantial advantage over a non-int,erleaved MLSE equalizer.

show abstract

Performance of coherent data transmission in frequency-selective Rayleigh fading channels

Cited by 13 publications

References 11 publications

<title>MC-CDMA with frequency domain diversity reception for sectored indoor wireless cellular networks</title>

<title>MC-CDMA with frequency domain diversity reception for sectored indoor wireless cellular networks</title>

Space-Time-Frequency Diversity Hybrid ARQ for MIMO-OFDM Systems

MLSE and soft-output equalization for trellis-coded continuous phase modulation

Contact Info

Product

Resources

About