Adaptive DC-offset compensation algorithm for burst mode operated direct conversion receivers

A low-redundancy DC-offset compensation method to achieve high-quality burst mode operated direct conversion receivers is proposed and studied. DC-offset is compensated for by using a short known-symbol sequence in preamble. It is demonstrated by computer simulations that five redundant symbols can drastically suppress DC-offset with the DC-offset ratio up to 40% with degradation of only 1.5 dB. It is also demonstrated that, if the DC-offset ratio to be compensated for is small, only three redundant symbols can sufficiently suppress the DC-offset.<<ETX>>

[1]  K. Anvari,et al.  Performance of a direct conversion receiver with pi /4-DQPSK modulated signal , 1991, [1991 Proceedings] 41st IEEE Vehicular Technology Conference.

[2]  D.C. Cox,et al.  Universal digital portable radio communications , 1987, Proceedings of the IEEE.

[3]  D. M. Haines,et al.  Direct conversion transceiver design for compact low-cost portable mobile radio terminals , 1989, IEEE 39th Vehicular Technology Conference.

[4]  Yoshihiko Akaiwa.  A conceptual design of microcellular radio communication system , 1990, 40th IEEE Conference on Vehicular Technology.

[5]  J.K. Cavers,et al.  Adaptive compensation for imbalance and offset losses in direct conversion transceivers , 1991, [1991 Proceedings] 41st IEEE Vehicular Technology Conference.

[6]  T. Sato,et al.  The feasibility study of the Nyquist baseband filtered 4-level FM for digital mobile communications , 1985, 35th IEEE Vehicular Technology Conference.

[7]  T. Maeda,et al.  Design study on a direct conversion receiver front-end for 280 MHz, 900 MHz, and 2.6 GHz band radio communication systems , 1991, [1991 Proceedings] 41st IEEE Vehicular Technology Conference.

[8]  K. Feher,et al.  Performance improvement methods for DECT and other non-coherent GMSK systems , 1992, [1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology.