ABSTRACT
CONTENTS 7.1 System Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167 7.2 Hybrid System Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
7.2.1 Performance Metric . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169 7.2.2 Hybrid Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171 7.2.3 Power Loading in Hybrid Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
7.2.3.1 Power Loading Scheme 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174 7.2.3.2 Power Loading Scheme 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
7.3 Collaborative Hybrid System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 7.3.1 DPC Precancellation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 7.3.2 Broadcast Coverage Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
7.4 Numerical Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 7.5 Structured Dirty Paper Coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182 7.6 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Appendix A: Proof of Theorem 6.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Rarely have wireless innovations changed everyday life as widely and profoundly as broadcast TV network and mobile cellular network. Since its inception, broadcast TV has served the public for a century and penetrated into almost every household; however, viewership in the US has decreased significantly over the last three decades. Meanwhile, the number of mobile connected devices exceeded the global population in 2013, and forecasters [1] predicted that mobile video traffic will increase 13-fold between 2014 and 2019, reaching 17.5 exabytes per month and accounting for
nearly three-fourths of the world’s mobile data traffic by 2019. This huge demand for mobile broadband service is occurring while radio spectrum, a necessary ingredient for this service, is becoming increasingly more scarce. Even with the increased availability of unlicensed spectrum (for Wi-Fi offload) and the denser deployment of infrastructure, we still face the need for additional spectrum for mobile services.
