Paper Info
Title
Multi-User Capacity Of Cyclic Prefix Direct Sequence Spread Spectrum With Linear Detection And Precoding
Abstract
Cyclic Prefix Direct Sequence Spread Spectrum (CP-DSSS) is a promising solution to increase user density for massive machine type communication (mMTC) applications. We propose that in such applications, the CP-DSSS waveform would operate as a secondary network, using the same spectrum as the primary network but at much lower signal to noise ratio (SNR). In this paper, we evaluate per-user capacity of CP-DSSS when simple matched filtering (MF) is performed on the uplink and time-reversal (TR) precoding is used on the downlink. In this setting and when operating in the low SNR regime, CP-DSSS achieves a per-user capacity that is near the optimum single-user capacity. TR precoding converges to the optimal capacity as the number of antennas at the hub/gateway increases. Using the estimated channel impulse response for MF and TR introduces little to no capacity loss. Given the near-optimal performance of MF detection and TR precoding for each of the users, CP-DSSS can be implemented with simple device transceiver structures, reducing per-unit cost for massively deployed 5G and beyond networks.
Year
DOI
Venue
2020
10.1109/VTC2020-Fall49728.2020.9348755
2020 IEEE 92ND VEHICULAR TECHNOLOGY CONFERENCE (VTC2020-FALL)
DocType
Citations 
PageRank 
Conference
0
0.34
References 
Authors
0
4
Name
Order
Citations
PageRank
Kenney Brent A.100.68
Majid Arslan J.200.68
hussein moradi3508.06
Behrouz Farhang-Boroujeny497284.30