Link Resource Adaptation for Multiantenna Bit-Interleaved Coded Multicarrier Systems

• Published in: IEEE transactions on signal processing Vol. 60; no. 7; pp. 3644 - 3656
• Main Authors: Stupia, I., Lottici, V., Giannetti, F., Vandendorpe, L.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-07-2012; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Adaptation; Applied sciences; Automatic repeat request; Automatic repeat request (ARQ); bit-interleaved coded modulation; Coding, codes; cross-layer link resource adaptation; Detection, estimation, filtering, equalization, prediction; Encoding; Exact sciences and technology; Exact solutions; goodput; Information, signal and communications theory; Links; Mathematical analysis; Mathematical models; Measurement; MIMO; Modulation; Modulation, demodulation; multiple-input multiple-output (MIMO); Multiplexing; Networks; OFDM; orthogonal frequency division multiplexing (OFDM); power allocation; Product introduction; Quality of service; Radio; Signal and communications theory; Signal, noise; Studies; Telecommunications and information theory; Wireless networks; Performance evaluation; Wireless telecommunication; Mapping; Time variation; Accuracy; cross-layer link resource adaptation; Coding; Power distribution; Modulation; Cross-layer approach; orthogonal frequency division multiplexing (OFDM); High rate transmission; Availability; MIMO system; goodput; Automatic repeat request (ARQ); Multicarrier; power allocation; multiple-input multiple-output (MIMO); Computational complexity; Orthogonal frequency division multiplexing; Signal processing; Interleaved codes; Wireless network; Numerical simulation; Metric; bit-interleaved coded modulation; Automatic repeat request; Service quality; Signal to noise ratio
• ISSN: 1053-587X; 1941-0476
• DOI: 10.1109/TSP.2012.2192110

The availability of flexible radio interfaces capable of adapting their configuration to the time-varying operating environment is the key response to the demand encountered in modern wireless networks for high data rates under strict quality of service (QoS) constraints. To this end, this paper develops a novel link resource adaptation (LRA) scheme for soft-decoded multiantenna (MIMO) bit interleaved coded orthogonal frequency division multiplexing (BIC-OFDM) transmissions employing automatic repeat request (ARQ) mechanisms. As the first step, a simple link performance evaluation model based on the effective signal-to-noise ratio (SNR) mapping concept is derived in a closed-form expression that it is shown to yield better accuracy than previous techniques. Then, an effective LRA strategy is formulated taking advantage of that framework. The aim is maximizing the goodput (GP) metric, that is to say, the number of information bits delivered without error to the user by unit of time, over the available radio resources, such as the power distribution on the subchannels, coding rate, modulation order and the MIMO configuration. The numerical results demonstrate considerable performance gains compared with nonadaptive transmissions, while keeping the computational complexity at affordable levels in view of the specific structure of the GP objective function.