Results
repositories = "Linköping University Electronic Press"
> : "Linköping University, Linköping University, Communication Systems"
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Cooperative Beamforming for the MISO Interference Channel
Description :
A distributed beamforming algorithm is proposed for the two-user multiple-input single-output (MISO) interference channel (IFC). The algorithm is iterative and uses as bargaining value the interference that each transmitter generates towards the receiver of the other user. It enables cooperation amo...
Repository :
Linköping University Electronic Press
Language(s) :
English
Optimal and Near-Optimal Spectrum Sensing of OFDM Signals in AWGN Channels
Description :
We consider spectrum sensing of OFDM signals in an AWGN channel. For the case of completely unknown noise and signal powers, we derive a GLRT detector based on empirical second-order statistics of the received data. The proposed GLRT detector exploits the non-stationary correlation structure of t...
Repository :
Linköping University Electronic Press
Language(s) :
English
Efficient Computation of the Pareto Boundary for the MISO Interference Channel with Perfect CSI
Description :
We consider the two-user multiple-input single-output (MISO) interference channel and the rate region which is achieved when the receivers treat the interference as additive Gaussian noise and the transmitters have perfect channel state information (CSI). We propose a computationally efficient metho...
Repository :
Linköping University Electronic Press
Language(s) :
English
Retransmission Strategies for Symmetric Relaying Using Superposition Modulation
Description :
In this paper, we study retransmission strategies for the symmetric relaying scenario when the number of retransmissions for a data packet is limited. We propose a retransmission scheme based on superposition modulation and give the exact packet drop probability expression for it when only one retra...
Repository :
Linköping University Electronic Press
Language(s) :
English
Reducing Downlink Signaling Traffic in Wireless Systems Using Mobile-Assisted Scheduling
Description :
©2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other wo...
Repository :
Linköping University Electronic Press
Language(s) :
English
Computational Complexity of Decoding Orthogonal Space-Time Block Codes
Description :
The computational complexity of optimum decoding for an orthogonal space-time block code {cal G}_N satisfying {cal G}_N^H{cal G}_N=c(∑_{k=1}^Kos_ko^2)I_N where c is a positive integer is quantified. Four equivalent techniques of optimum decoding which have the same computational complexity are speci...
Repository :
Linköping University Electronic Press
Language(s) :
English
A Unified Framework for GLRT-Based Spectrum Sensing of Signals with Covariance Matrices with Known Eigenvalue Multiplicities
Description :
In this paper, we create a unified framework for spectrum sensing of signals which have covariance matrices with known eigenvalue multiplicities. We derive the generalized likelihood-ratio test (GLRT) for this problem, with arbitrary eigenvalue multiplicities under both hypotheses. We also show a nu...
Repository :
Linköping University Electronic Press
Language(s) :
English
Linear Multihop Amplify-and-Forward Relay Channels: Error Exponent and Optimal Number of Hops
Description :
We compute the random coding error exponent for linear multihop amplify-and-forward (AF) relay channels. Instead of considering only the achievable rate or the error probability as a performance measure separately, the error exponent results can give us insight into the fundamental tradeoff between ...
Repository :
Linköping University Electronic Press
Language(s) :
English
Optimal Resource Allocation for IR-HARQ
Description :
In this work, we first provide an exact closed-form expression for the packet drop probability (PDP) in incremental redundancy (IR) based hybrid automatic repeat request (HARQ) schemes with a limit on the maximum number of transmissions. In the later part, we extend our work in [5], and consider the...
Repository :
Linköping University Electronic Press
Language(s) :
English
Near-Optimal Soft-Output Fixed-Complexity MIMO Detection via Subspace Marginalization and Interference Suppression
Description :
The fundamental problem of our interest here is soft MIMO detection. We propose a method that yields excellent performance, atlow and at fixed (deterministic) complexity. Our method provides a well-defined tradeoff between computational complexity and performance. Apart from an initial step consisti...
Repository :
Linköping University Electronic Press
Language(s) :
English