Energy Efficient Scalable Sub-band based Ultra-Wideband System

Scalable subband subsampled radio architecture for millimetre wave communications with performance analysis

“…Fractional power savings in proposed scheme compared with the IEEE 802.11ad system is obtained as We consider power saving through the sampling rate reduction only and power consumption for other hardware blocks are assumed to be same for proposed receiver and IEEE 802.11ad receiver. For wideband receivers, assuming 30–45% of total power consumption is attributed to ADC [25], and thus the power saving of the proposed scheme calculated based on 1/3rd of the sampling rate as compared with IEEE 802.11ad scheme is Therefore, the proposed system yields a power saving of 24% as compared with IEEE 802.11ad system utilising MCS 27, 28, and 29 with comparable data rates (from Table 2). In addition to this, all the baseband signal processing in the proposed scheme are done at subsampled rate which further reduces system power consumption.…”

“…Next generation networks are expected to support dense deployment of nodes, and hence the research emphasis is on energy‐aware system development [20]. Energy‐efficient systems can be realised through new transceiver architectures [21, 22], judicious bandwidth allocation strategies [23–25], novel signal processing techniques [26, 27], and optimum medium access control (MAC) layer scheduling schemes [28]. System architectures with support for mmWave antenna beamforming offer promising new solutions to realise power‐efficient operation and are actively being investigated by the research community [29].…”

“…The receiver power consumption is reduced significantly as compared with conventional system architectures due to the deployment of a single ADC which subsamples 2 GHz wide received signal and thus is required to operate at low sampling rate. To support the system architecture, we also propose a novel band plan consistent with the scheme reported in [25, 36] which addresses the requirements of coexistence with existing and future technologies operating in the 60 GHz band. Moreover, the proposed scheme enables the utilisation of frequency diversity to improve the error performance with the added flexibility of scalable data rates to meet varying QoS requirements.…”