Each node in the network maintains three modules: send module, receive module and token processing module, and is equipped with a tunable transceiver in contrast to the previous work which uses an array of fixed transceivers.
Fixing a modern transceiver often involves nothing more than a VLSI chip replacement.
Most existing proposals apply device-level power conservation strategy, which intends to switch off the entire device (router/switch) including fixed overheads (like fans, linecards, transceivers, etc).
However, these researches assumed the signal-to-noise-ratio (SNR) at receiver(s) is fixed, the distance between the transceivers and the transmit power of transmitter(s) are not considered.
In these cases, the position of a mobile transceiver is determined from the distances to a set of fixed, well-localized beacons.
For low-order constellations, the simulation results show that the two techniques are practically equivalent in terms of symbol error rate; moreover, they also show that a WL MMSE transceiver with constellation adaptation is clearly superior to the same equalizer with fixed constellation.
In traditional communication systems, the position of the base transceiver stations (BTS) or access points (or any other device providing communication access) is fixed and cannot be changed to improve the SINR.
The digital gain value is fixed, as it is determined solely by the difference in the ADC and DAC dynamic ranges and does not depend on the RF transceiver's gain settings.
In multi-hop MIMO relay systems, when the distance between the base station (Tx) and the final receiver (Rx) is fixed, the distance between the Tx to a relay node (RS), an RS to an RS, an RS to the Rx called the distances between transceivers, is shorten.
In MMRSs, when the distance between the base station (Tx) and the final receiver (Rx) is fixed, the distance between the Tx to a relay (RS), a RS to a RS, a RS to the Rx called the distance between each transceiver, is shorten.
