We study the degrees of freedom (DoF) of a K-user parallel MISO broadcast channel with arbitrary levels of partial CSIT over each subchannel. We derive a sum-DoF upperbound which depends on the average CSIT quality of each user. This upperbound is shown to be tight under total order, i.e. when the order of users with respect to their CSIT qualities is preserved over all subchannels. In this case, it is shown that separate coding over each subchannel is optimum in a sum-DoF sense.
|Title of host publication||2017 IEEE Global Communications Conference, GLOBECOM 2017 - Proceedings|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||6|
|Publication status||Published - 2017 Jul 1|
|Event||2017 IEEE Global Communications Conference, GLOBECOM 2017 - Singapore, Singapore|
Duration: 2017 Dec 4 → 2017 Dec 8
|Name||2017 IEEE Global Communications Conference, GLOBECOM 2017 - Proceedings|
|Other||2017 IEEE Global Communications Conference, GLOBECOM 2017|
|Period||17/12/4 → 17/12/8|
Bibliographical noteFunding Information:
This work is partially supported by the U.K. Engineering and Physical Sciences Research Council (EPSRC) under grant EP/N015312/1.
© 2017 IEEE.
ASJC Scopus subject areas
- Computer Networks and Communications
- Hardware and Architecture
- Safety, Risk, Reliability and Quality