Theoretical limitations on frequency and time diversity for fading binary transmissions

Pierce, John N.

doi:10.1109/tcom.1961.1097668

Cited by 26 publications

(9 citation statements)

References 3 publications

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“…From Eqs. (17) and (18) [10] and [11], the gap in the required energy to achieve the target bit error rate between diversity orders 1 and 2 is over 10 dB and that between diversity orders 7 and 8 is less than 1 dB. Therefore, in our proposed technique, even if the RB is assigned to the second-ranked MS, when the number of MSs is large, the performance degradation is slight.…”

Section: Papr-cut-off Rate and Papr-throughput Tradeoffsmentioning

confidence: 88%

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Resource Block Assignment to Reduce Peak to Average Power Ratio in Multi-User OFDM

Takyu

Umeda

Sasamori

et al. 2014

IEICE Trans. Commun.

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SUMMARYThis paper proposes the assignment of resource blocks (RBs) to reduce the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) in a multi-user OFDM system. This system ranks the users according to the channel state information (CSI) for RB assignment. In our proposed technique, an RB is assigned to either the first-or second-ranked mobile station (MS) to minimize the PAPR of the OFDM signal. While this process reduces the PAPR, the throughput is also reduced because of the user diversity gain loss. A PAPR-throughput tradeoff is then established. Theoretical analyses and computer simulations confirm that when the number of MSs becomes large, the PAPR-throughput tradeoff is eased because of the minimal effect of the diversity gain loss. Therefore, significant PAPR reduction is achieved with only a slight degradation in the throughput. key words: multiuser OFDM, PAPR, resource block assignment

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Section: Papr-cut-off Rate and Papr-throughput Tradeoffsmentioning

confidence: 88%

“…For example, when the numbers of users are two and eight, the throughput differences between N Lreq = 1 and 8192 are 0.85 and 0.25 bits/symbol/subcarrier, respectively. The reason for this difference is related to the diversity limitation [10], [11]. From Eqs.…”

Section: Papr-cut-off Rate and Papr-throughput Tradeoffsmentioning

confidence: 99%

Resource Block Assignment to Reduce Peak to Average Power Ratio in Multi-User OFDM

Takyu

Umeda

Sasamori

et al. 2014

IEICE Trans. Commun.

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“…Pierce (1966) showed that the performance of a noncoherent -ary system with diversity branches approaches the Shannon limit just as that of a coherent system when and approach infinity. However, in a binary system ( = ) there is a finite optimal dependent on the received signal-to-noise ratio (SNR) per bit for which the bit error probability performance is optimized (Pierce, 1961). In this case there is always a certain loss compared to the corresponding binary coherent orthogonal system.…”

Section: Historical Development Of Phase-unaware Detection Methodsmentioning

confidence: 99%

Low Complexity Phase-Unaware Detectors Based on Estimator-Correlator Concept

Anttonen¹,

Mämmelä²,

Pasupathy³

2011

Ultra Wideband Communications: Novel Trends - System, Architecture and Implementation

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“…During this period, a tremendous effort was invested to collect real data to illustrate the fading channel, and some practical mathematical models were built [23,26]. The single most important idea for combating fading phenomenon, i.e., "diversity", was also formed in this period [39,40,41,42,43,44,45,46]. Even a lot of work was performed in the area of detection, the resulting systems were not reliable enough for some computer communication applications.…”

Section: Literature Reviewmentioning

confidence: 99%

Wavelet Modulation and Transmission Through Fading Channels

Moon¹,

Lo²

2000

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In separi.ce parts, this report addresses: (I) the use of multiscale modulation to obtain bandwidth-, efficient modulation, and the performance of such modulation in fading channels; (2) The analysis of transmission through fading channels, and approaches to the design of transmitter and receiver waveforms which will perform optimally in fading channels. In the first case, it is shown that using wavelet and/or scaling waveforms can lead to modulation which is comparable to, or better than, many conventional schemes, including GMSK. Performance in fading channels is similar to that of other methods. The Performance of multiscale signaling is also addressed using the matched-filter bound method. In the second part, the signal design problem is formulated as an optimization problem and an analysis approach outlined which leads to maximization of SNR in fading channels. Inclusion of constraints for good spectral localization is also possible.

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Theoretical limitations on frequency and time diversity for fading binary transmissions

Cited by 26 publications

References 3 publications

Resource Block Assignment to Reduce Peak to Average Power Ratio in Multi-User OFDM

Resource Block Assignment to Reduce Peak to Average Power Ratio in Multi-User OFDM

Low Complexity Phase-Unaware Detectors Based on Estimator-Correlator Concept

Wavelet Modulation and Transmission Through Fading Channels

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