7/8/2023 0 Comments Signal bandwidthThis research project aims to push the boundaries of wireless transmitter key capabilities that enable future communication technologies. Clearly, there is a lack of an essential measurement capability that does not allow the use of inherently nonlinear transmitters in the presence of wideband signals. This high speed measurement capability does not exist and state of the art (December 2015) instrumentation claims 2GHz observation bandwidth only. In this example, 5GHz sampling speed is required to fully analyse the output signal. For example, in millimetre wave application, more than 1GHz is likely to be common place as the minimum bandwidth for input signals, hence, the output signal will exhibit 5GHz of bandwidth. This procedure consists of driving the transmitter with an input signal that has a given bandwidth, and measuring the output signal at a sampling frequency five times the input signal bandwidth. This is where the measurement procedure called “vector signal analysis” can be performed. It is possible to compensate for this nonlinear behaviour if the transmitter nonlinearities are identified. In the presence of wideband signals the nonlinear behaviour of the transmitter corrupts the signal to be transmitted which results in unwanted corrupted transmitted data and extended frequency occupation. ![]() Therefore it is vital to develop wireless transceiver architecture that is linear, efficient and over wider bandwidths than today, otherwise the deployment of future wireless communication systems is going to face massive sustainability and even feasibility problems. Moreover, reducing the power consumption of wireless communication infrastructure goes far beyond the reduction of the deployment and running costs of wireless networks since small cell architecture deployment will massively increase the number of transceiver modules and hence the amount of energy they consume. Therefore, linear transmission and reception of signals is essential for reliable communications to occur. In the presence of wideband signals, nonlinear behaviour is exhibited by these semiconductor components which results in corruption of the data and an increase of up to five times in the signal bandwidth. This hardware consists of transmission and reception architectures based on semiconductor components. The hardware required to deliver this amount of data transfer has to handle signals that exhibit more than 1GHz bandwidth. The deployment of small cells solutions working with signals in the millimetre wave frequency domain is a strong candidate and significant funding and research work is currently taking place. For example, 5G is aiming to deliver 1Gb/s data transfer speed (more for local radio networks), 10 times more than current 4G wireless communication systems. ![]() The development of future wireless communication standards is aiming to offer an increased data transfer capabilities.
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