Power Allocation and Bit Loading for Fixed Wireless MIMO Channels
Conference: SCC 2013 - 9th International ITG Conference on Systems, Communication and Coding
01/21/2013 - 01/24/2013 at München, Deutschland
Proceedings: SCC 2013
Pages: 6Language: englishTyp: PDF
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Authors:
Delamotte, Thomas; Bauch, Gerhard (Institute of Information Processing, Universität der Bundeswehr München, 85579 Neubiberg, Germany)
Dantona, Vito; Lankl, Berthold (Institute of Communications Engineering, Universität der Bundeswehr München, 85579 Neubiberg, Germany)
Abstract:
Power allocation and bit loading strategies can be considered in the context of diagonalized MIMO channels in order to maximize the achievable sum rate for a given sum transmit power. An algorithm, known as QoS based waterfilling, was specifically designed for such applications. In this contribution, based on the recently discovered mutual information maximizing mercury-waterfilling power allocation, we design a new strategy and compare its performance to the state of the art QoS based Waterfilling. It is shown that a simple modification of the latter algorithm can significantly improve the system performance with affordable complexity. Index Terms — Waterfilling, mercury/waterfilling, mutual information, Multiple-Input-Multiple-Output (MIMO), bit loading.