The effectiveness of the derived metrics in selecting appropriate branches of sufficient channel quality in selection combining diversity systems are also investigated.
To achieve this goal, we apply an OFDM-based variable-length Bloom filter (VBF) [14] that synergistically integrates two operations: (i) the channel quality estimation for exploiting frequency diversity and (ii) the frequency-aware channel coordination to meet the QoS requirements.
Due to diversity in the channel quality and data rate of the applications, some flows' packets may be experiencing a higher HoL and some less.
As suggested in [20], in the general context of describing the behaviour of a diversity system with arbitrary combining techniques, the channel quality based on channel statistics can be used for performance evaluation.
Unlike the conventional Induced Multiuser Diversity Relaying (IMDR) scheme, our scheme acquires channel quality information (CQI) in which the destined node (DN) sends pilots on a reserved radio resource.
However, if the channels are not independent, the probability that one of the users has good channel quality while the others experience bad channels, and correspondingly the effect of multiuser diversity, decreases.
In general, schedulers favor the users with better channel quality because the optimal resource allocation schedules the user with the best channel to exploit multiuser diversity and channel fading, or perhaps the scheduler does not allocate any resources for the mobile host with high error rate because the packets would be dropped anyway.
In addition, eOCSA and WLFF may construct bursts on the subchannels with unacceptable channel quality, and thus, cannot use any suitable MCS to transmit data because they do not consider subchannel diversity.
Instantaneous rate adaptation is an important tool for exploiting diversity of the wireless channel in LTE, by adjusting the transmission rate according to the current channel quality experienced by a user.
The use of channel quality index measurements is defined in LTE standard to regulate AMC scheme, therefore the scheduler must use channel quality measurements to enable channel diversity for UE.
