Abstract
Although the full multiple-symbol detection (MSD) for IEEE 802.15.4c multiple phase shift keying (MPSK) receivers gives much better performance than the symbol-by-symbol detection (SBSD), its implementation complexity is extremely heavy. We propose a simple MSD scheme based on two implementation-friendly but powerful strategies. First, we find the best and second-best decisions in each symbol position with the standard SBSD procedure, and the global best decision is frozen. Second, for the remaining symbol positions, only the best and second-best symbol decisions, not all the candidates, are jointly searched by the standard MSD procedure. The simulation results indicate that the packet error rate (PER) performance of the simplified MSD scheme is almost the same as that of the full scheme. In particular, at PER of 1 × 10 − 3 , no more than 0.2 dB performance gap is observed if we just increase the observation window length N to 2. However, the number of decision metrics needed to be calculated is reduced from 256 to 2. Thus, much balance gain between implementation complexity and detection performance is achieved.
Highlights
With the widespread application of new information and communication technologies such as the Internet of ings (IoT), cloud computing, and big data, smart cities have developed rapidly in recent years. ey have penetrated into all aspects of people’s lives and greatly meet the modern people’s pursuit of convenient, fast, and high-quality life [1,2,3,4,5,6,7]
Erefore, it is important to study robust detection technology of multiple phase shift keying (MPSK) signal in line with the characteristics of wireless IoT. is paper focuses on the multiple-symbol detection (MSD) of IEEE 802.15.4c MPSK receiver
We summarize our main contributions as follows: (i) e optimal MSD scheme for IEEE 802.15.4c MPSK receivers based on the maximum likelihood criterion can give excellent results in the case of both slow fading and pure additive white Gaussian noise (AWGN) channels
Summary
With the widespread application of new information and communication technologies such as the Internet of ings (IoT), cloud computing, and big data, smart cities have developed rapidly in recent years. ey have penetrated into all aspects of people’s lives and greatly meet the modern people’s pursuit of convenient, fast, and high-quality life [1,2,3,4,5,6,7]. Is paper focuses on the multiple-symbol detection (MSD) of IEEE 802.15.4c MPSK receiver. The MSD scheme has excellent detection performance, its implementation complexity increases exponentially with the increase of the observation window length [11, 12]. We propose a simple MSD scheme for IEEE 802.15.4c MPSK receivers. Unlike the traditional receivers that were equipped with full MSD scheme with high complexity to achieve the best possible reliability, we pay our full attention to the simple design to balance the complexity and reliability. (i) e optimal MSD scheme for IEEE 802.15.4c MPSK receivers based on the maximum likelihood criterion can give excellent results in the case of both slow fading and pure additive white Gaussian noise (AWGN) channels. Us, we propose a new MSD algorithm, which greatly simplifies the full scheme.
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