A New Multiple-Symbol Differential Detection Strategy for Error-Floor Elimination of IEEE 802.15.4 BPSK Receivers Impaired by Carrier Frequency Offset

Table 1

Comparison of different estimation schemes.

Estimator	Subspace number	Involved mathematical approximation	Channel condition
(10)	2	No	Fading, no CSI
(11)	4		Fading, no CSI
(12)	4		Fading, no CSI
(13)	2		Fading, no CSI
(14)	2		Pure AWGN
(16)	4		Fading, no CSI
(18)	4		Fading, perfect CSI
(20)	4		Pure AWGN