Title :
Optimal Energy Efficient Bit and Power Loading for Multicarrier Systems
Author :
Qi Sun ; Lihua Li ; Tolli, Antti ; Juntti, Markku ; Junling Mao
Author_Institution :
State Key Lab. of Networking & Switching Technol., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
The energy efficient bit and power loading problem is studied for the multicarrier communication systems aiming to maximize the system energy efficiency (EE) under the total transmit power constraint, the per subcarrier bit error rate (BER) constraint and the minimum transmission rate constraint. To solve the non-convex combinatorial EE optimization problem, an equivalent one-dimensional problem is constructed and an optimal greedy bit and power loading algorithm is proposed. Furthermore, a simplified version of the bit and power loading algorithm is proposed as well to achieve the same optimal solution but with significant lower complexity.
Keywords :
adaptive modulation; combinatorial mathematics; energy conservation; error statistics; optimisation; equivalent one-dimensional problem; multicarrier communication system; nonconvex combinatorial EE optimization problem; optimal energy efficient bit; optimal greedy bit algorithm; per subcarrier bit error rate; power loading algorithm; system energy efficiency; total transmit power constraint; Algorithm design and analysis; Bit error rate; Complexity theory; Loading; OFDM; Optimization; Wireless communication; Energy efficiency; adaptive modulation; bit and power loading; multicarrier systems;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2014.2318300
