Bin Ren

Advanced IDD receiver for PDMA uplink system

The anticipated 1000 fold increase in traffic demand over the next decade and the explosion of new services and applications, such as the internet of things (IoT), pose great challenges for the current 4G mobile network. Pattern division multiple access (PDMA), as a novel non-orthogonal multiple access scheme, has been proposed recently to address these challenges. The performance of PDMA uplink system mainly depends on the receiver algorithm. The conventional message pass algorithm (MPA) cannot fully exploit the benefits of the coded PDMA system. In this paper, we devise an advanced receiver via iterative detection and decoding (IDD) algorithm which fully exploits coding potentials and diversity gains of the PDMA. The simulation results show that IDD based advanced receiver obtains a performance improvement about 1.6 dB at block error rate (BLER) of 0.01 for 300% overload compared with the MPA based approach.

Toward the Standardization of Non-Orthogonal Multiple Access for Next Generation Wireless Networks

Non-orthogonal multiple access (NOMA) as an efficient method of radio resource sharing has its roots in network information theory. For generations of wireless communication systems design, orthogonal multiple access schemes in the time, frequency, or code domain have been the main choices due to the limited processing capability in the transceiver hardware, as well as the modest traffic demands in both latency and connectivity. However, for the next generation radio systems, given its vision to connect everything and the much evolved hardware capability, NOMA has been identified as a promising technology to help achieve all the targets in system capacity, user connectivity, and service latency. This article provides a systematic overview of the state-of-theart design of the NOMA transmission based on a unified transceiver design framework, the related standardization progress, and some promising use cases in future cellular networks, based on which interested researchers can get a quick start in this area.

Performance Analysis of Cooperative Pattern Division Multiple Access (Co-PDMA) in Uplink Network

As a promising candidate non-orthogonal multiple access scheme for the fifth generation (5G) wireless communication system, pattern division multiple access (PDMA) has received considerable attention recently. Using pattern matrix (

Pattern Division Multiple Access (PDMA)

\text {G}_{\text {PDMA}}^{[{2,3}]}

Link Performance Estimation Technique for PDMA Uplink System

, as an example, is used in this paper), PDMA directly maps the information bits of different users to radio resources, such as code, power, time and frequency, and space resource. PDMA can meet the requirements of massive connectivity and higher spectral efficiency for the 5G mobile network. In order to further improve transmission reliability and enhance the coverage, an uplink cooperative PDMA (Co-PDMA) scheme with half-duplex decode and forward relay is proposed. The analytical expressions of outage probability (OP) and sum data rate are derived to characterize the performance of the proposed scheme. The results show that the proposed Co-PDMA scheme achieves superior outage performance, with gains of 8 and 12 dB over the non- Co-PDMA and cooperative orthogonal multiple access (Co-OMA), respectively, @ OP = 0.1. Besides, the scheme is found to outperform two other schemes in terms of higher sum data rate and achieve an almost maximum 50% gain over Co-OMA when every user has the same target data rate.

Pattern Division Multiple Access—A Novel Nonorthogonal Multiple Access for Fifth-Generation Radio Networks

Pattern division multiple access (PDMA) is a kind of non-orthogonal multiple access technology based on the principle of the introduced reasonable diversity between multi-user and joint design between transmitter and receiver to promote the capacity. PDMA can be used in 5G typical scenarios like eMBB, URLLC and mMTC, enhancing spectrum efficiency, increasing connections and decreasing latency. Followed by research work on key technologies of PDMA, PDMA was formerly included in the new technology trend report of ITU-R and now is being hotly discussed in 5G new radio standardization in 3GPP, also PDMA has passed the MIIT of China 5G trial. Further, more and more PDMA based extension technologies are being proposed by academics, pushing forward PDMA development.

Uplink pattern division multiple access in 5G systems

Pattern division multiple access (PDMA) is a promising non-orthogonal multiple access scheme for the fifth generation mobile communication system. Link performance estimation technique is the key to ensure accurate performance evaluation of the PDMA uplink system. Although the belief propagation (BP) receiver with near-optimal performance is normally considered for PDMA uplink system, it remains a big challenge for the estimation of the link performance for the PDMA uplink system with the BP receiver. In this paper, we first propose a novel link performance estimation technique for the PDMA uplink system with the BP receiver. The performance of the BP receiver is estimated by utilizing the genie-aided interference cancellation receiver as an upper bound with a single fitting parameter. Then, we provide a simple search process of finding the fitting parameter. Finally, the simulation results show that the proposed method achieves greater link performance estimation accuracy over the conventional method in the PDMA uplink evaluation.