
Dynamic Decode‐and‐Forward Relaying with Partial CSIT and Optimal Time Allocation
Author(s) -
Su Yinjie,
Jiang Lingge,
He Chen
Publication year - 2015
Publication title -
chinese journal of electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.267
H-Index - 25
eISSN - 2075-5597
pISSN - 1022-4653
DOI - 10.1049/cje.2015.01.032
Subject(s) - channel state information , computer science , relay , constraint (computer aided design) , transmitter , computer network , node (physics) , multiplexing , power (physics) , channel (broadcasting) , wireless , telecommunications , mathematics , engineering , physics , geometry , structural engineering , quantum mechanics
A Dynamic decode‐and‐forward (DDF) relaying protocol with partial Channel state information at the transmitter (CSIT) for a three‐node half‐duplex single‐antenna network, which consists of a single source destination pair and a relay, is proposed. A Diversity multiplexing trade off (DMT) analysis is presented, in which the DMT of the proposed protocol is derived in a closed form and an adaptive time allocation strategy is also developed to achieve the optimal performance. It is shown that time allocation with partial CSIT significantly improves the achievable DMT for DDF relaying. Moreover, unlike the existing DDF protocol with CSIT, which is performed with the assumption of long‐term power constraint, the proposed protocol can be generalized to the practical scenarios where a strict short‐term power constraint is often imposed on, due to the environmental safety and interference prevention.