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shrank unexpectedly by 0.3% in august. manchester crown court hears how a nurse, accused of murdering babies on a neonatal ward, tried to kill a premature baby girl on two consecutive night shifts. after the latest russian attacks on ukraine, nato says sending air defence systems there is a top priority. blood supplies fall to a critically low level in england, prompting nhs blood and transplant to declare its first ever amber alert — hospitals may have to postpone some elective surgery. and scientists successfully transplant tissue from a human brain to that of a newborn rat and s...

Grant-free random access is promising in achieving massive connectivity with sporadic transmissions in massive machine type communications (mMTC) for internet of things (IoT) applications, where the hand-shaking between the access point (AP) and users is skipped, leading to high multiple access efficiency. In grant-free random access, the AP needs to identify the active users and perform channel estimation and signal detection. Conventionally, pilot signals are required for the AP to achieve user activity detection and channel estimation before active user signal detection, which may still res...

If you have ever used JavaScript in the past, there is a high chance you have encountered the async / await syntax. async…

We investigate signal detection in multiple-input-multiple-output (MIMO) communication systems with hardware impairments, such as power amplifier nonlinearity and in-phase/quadrature imbalance. To deal with the complex combined effects of hardware imperfections, neural network (NN) techniques, in particular deep neural networks (DNNs), have been studied to directly compensate for the impact of hardware impairments. However, it is difficult to train a DNN with limited pilot signals, hindering its practical application. In this work, we investigate how to achieve efficient Bayesian signal detect...

Dual pulse shaping (DPS) transmissions enable the use of A/D and D/A converters with half of the symbol rate, alleviating the requirement of high speed conversion devices in wideband millimeter wave communications. In this letter, we focus on DPS equalization and propose a unitary approximate message passing (UAMP) based equalization technique. Two DPS transmission schemes are considered, and by exploiting the special structure of the system transfer matrix, two low-complexity equalizers are developed with the fast Fourier transform (FFT). Simulation results show that significant performance g...