Simple and robust near‐optimal single differential detection scheme for IEEE 802.15.4 BPSK receivers

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

“…is is also intuitively observed for the estimator given in (12) as depicted in Figure 6 of this work. Surprisingly, unlike the conventional scheme, error floor does not arise in our new MSDD as observed from Figures 4 to 6.…”

“…Following the result reported in equation (35) of [12], a more complexity efficient estimator can be intuitively specialized as Input: r m,k : complex baseband chip sample sequence; L 1 : sample number for each bit of the actual data; L 2 : observation length of the preamble in bit intervals; L 3 : number of the autocorrelation sample for m-th bit of the preamble; K: length of the PN sequence; L: payload length of the PPDU; N: block length. Output: (19) end for (20) compute the metric Ξ for each hypothetical phase sequence; (21) find an absolute phase sequence…”

“…Clearly, the method given in equation (36) of [12] can also be used for estimation. In particular, (4) is now given by…”

“…e IEEE 802.15.4 binary phase shift keying (BPSK) physical layer (PHY) has found appropriate and wide range of application in WSNs [8,9]. Previous works pay much attention towards developing single di erential coherent detection (SDCD) strategy under the condition that the receiver is impaired by carrier frequency offset (CFO) [10][11][12]. e reader can refer to [12] for a detailed discussion.…”

“…erefore, we further turn all our attention towards the MSDD scheme without error floor under both pure AWGN and fading channels in the presence of CFO. It should be mentioned that CFO and spread spectrum coding are not considered in these pioneering works [12,13]. For a detailed discussion and an extensive list of references of MSDD, the authors suggest [13,15].…”