Great Expectations: The Value of Spatial Diversity in Wireless Networks

Diggavi, Suhas; Al-Dhahir, Naofal; Stamoulis, A.; Calderbank, A.R.

doi:10.1109/jproc.2003.821914

Cited by 232 publications

(122 citation statements)

References 293 publications

(468 reference statements)

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“…This 3-G network can provide circuit switched voice service, circuit switched data service like 2-G (CDMA One or GSM) [3], [5], in addition to this packet switched data and multimedia service [6]- [9]. [2], [6], [7]. Thus AN acts as an interface between AT and PDSN.…”

Section: Architecture Of 3-g Mobile Systemmentioning

confidence: 99%

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A Novel Approach for Authentication Technique in Mobile Communications

Koner¹,

Bhattacharjee²,

Bhunia³

et al. 2009

IJCTE

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Section: Architecture Of 3-g Mobile Systemmentioning

confidence: 99%

“…interface frame and an IP end point that may be an IP-enabled phone, IP based PBX or PC etc [7]- [9].…”

Section: An Atmentioning

confidence: 99%

A Novel Approach for Authentication Technique in Mobile Communications

Koner¹,

Bhattacharjee²,

Bhunia³

et al. 2009

IJCTE

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“…There is an intrinsic tradeoff between the ratedistortion adaptation at the sources and the channel coding adaptation at the links. We try to utilize the diversity in networks [6], [7]. The optimal resource allocation by jointly optimize the rate-distortion adaptation and channel coding adaptation is investigated.…”

Section: Joint Rate-distortion Adaptation and Channel Coding Adapmentioning

confidence: 99%

Network Resource Allocation for Competing Multiple Description Transmissions

Liu

Tian

Diggavi

et al. 2008

IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference

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Providing real-time multimedia services over a best-effort network is challenging due to the stringent delay requirements in the presence of complex network dynamics. Multiple description (MD) coding is one approach to transmit the media over diverse (multiple) paths to reduce the detrimental effects caused by path failures or delay.The novelty of this work is to investigate the resource allocation in a network, where there are several competing MD coded streams. This is done by considering a framework that chooses the operating points for asymmetric MD coding to maximize total quality of the users, while these streams are sent over multiple routing paths.We study the joint optimization of multimedia (source) coding and congestion control in wired networks. These ideas are extended to joint source coding and channel coding in wireless networks. In both situations, we propose distributed algorithms for optimal resource allocation.In the presence of path loss and competing users, the service quality to any particular MD stream could be uncertain. In such circumstances it might be tempting to expect that we need greater redundancy in the MD streams to protect against such failures. However, one surprising aspect of our study reveals that for large number of users who compete for the same resources, the overall system could benefit through opportunistic (hierarchical) strategies.In general networks, our studies indicate that the user composition varies from conservative to opportunistic operating points, depending on the number of users and their network vantage points.

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“…3 compares the BER performance of the MMSE and MBER STE based MUDs. The BER of a STE based MUD was computed using the theoretic BER formula (18), the MMSE STE weight vector was calculated using the formula (12), and the MBER STE solution was computed numerically using the simplified conjugate gradient algorithm. It can be seen that for both L = 2 and L = 4 as well as for all three users the MBER STE detectors had better BER performance than the corresponding MMSE detectors.…”

Section: A Stationary Systemmentioning

confidence: 99%

“…Smart antenna aided space-time processing is capable of substantially improving the achievable wireless system capacity, coverage and quality by suppressing the effects of both intersymbol interference and co-channel interference [1]- [12]. We consider the multiple-input multiple-output (MIMO) system based on a space division multiple access (SDMA) scheme, where each transmitter employs a single antenna, while the receiver has multiple antennas.…”

Section: Introductionmentioning

confidence: 99%

Adaptive space-time equalisation for multiple-antenna assisted multiple-input multiple-output systems

Livingstone

Chen

2005

2nd IEE/EURASIP Conference on DSPenabledRadio

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This paper investigates an adaptive space-time equalisation (STE) assisted multiuser detection scheme for multiple-antenna aided multiuser systems. A minimum bit error rate (MBER) design is compared with the standard minimum mean square error (MMSE) design. It is shown that the MBER design provides significant performance enhancement, in terms of achievable system bit error rate, over the MMSE design for the multiple-antenna assisted multiple-input multiple-output communication scenario. Adaptive implementation of the MBER STE is realised using a stochastic gradient based least bit error rate algorithm, which is demonstrated to consistently outperform the adaptive least mean square based STE.

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Great Expectations: The Value of Spatial Diversity in Wireless Networks

Cited by 232 publications

References 293 publications

A Novel Approach for Authentication Technique in Mobile Communications

A Novel Approach for Authentication Technique in Mobile Communications

Network Resource Allocation for Competing Multiple Description Transmissions

Adaptive space-time equalisation for multiple-antenna assisted multiple-input multiple-output systems

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