SC and OFDM hybrid coherent optical transmission scheme based on 1-bit bandpass delta-sigma modulation
T Xie, X Xin, L Fang, H Yan, X Pan, X Li - Optics Express, 2024 - opg.optica.org
High-order quadrature amplitude modulation (QAM) can effectively improve the capacity and
spectral efficiency of coherent optical transmission systems. However, as the modulation …
spectral efficiency of coherent optical transmission systems. However, as the modulation …
Transmitter architecture for CA: Carrier aggregation in LTE-advanced systems
CA has already found its place in the deployment of 4G wireless networks. It successfully
shows its value as an efficient way to increase the signal bandwidth within the available …
shows its value as an efficient way to increase the signal bandwidth within the available …
Real-Time Gbps Sigma Delta Radio-over-Fiber for a Low-Cost 5G C-RAN Downlink
A 4-lane proof-of-concept real-time sigma-delta-over-fiber system targeting 5G C-RAN
downlink is demonstrated using off-the-shelf components. Per lane, an EVM of 2.67% is …
downlink is demonstrated using off-the-shelf components. Per lane, an EVM of 2.67% is …
Concurrent multiband digital outphasing transmitter architecture using multidimensional power coding
All-digital outphasing transmitter architecture using multidimensional power coding (MDPC)
is proposed for noncontiguous concurrent multiband transmission with a high power …
is proposed for noncontiguous concurrent multiband transmission with a high power …
Highly efficient 3-bit digital power amplifier for OFDM waveform amplification
In this work, we present a digital power amplifier (DPA) and a signal-optimized control
technique suitable for the amplification of orthogonal frequency division multiplexing …
technique suitable for the amplification of orthogonal frequency division multiplexing …
[HTML][HTML] A bit-interleaved sigma-delta-over-fiber fronthaul network for frequency-synchronous distributed antenna systems
Cell-free massive multiple-input multiple-output (MIMO) has attracted wide attention as
wireless spectral efficiency has become a 6G key performance indicator. The distributed …
wireless spectral efficiency has become a 6G key performance indicator. The distributed …
A frequency-division MIMO FMCW radar system using delta-sigma-based transmitters
In this paper, we present a system that allows to realize frequency-division multiplexing
multiple-input multiple-output (MIMO) radars which are based on the frequency-modulated …
multiple-input multiple-output (MIMO) radars which are based on the frequency-modulated …
Parallel Delta-Sigma Modulator-Based Digital Predistortion of Wideband RF Power Amplifiers
M Othmani, N Boulejfen, M Turunen… - … on Circuits and …, 2022 - ieeexplore.ieee.org
In this article, we propose a new robust and highly efficient digital predistortion (DPD)
concept for the linearization of wideband RF power amplifiers (PAs). The proposed …
concept for the linearization of wideband RF power amplifiers (PAs). The proposed …
Reducing quantization noise to boost efficiency and signal bandwidth in delta–sigma-based transmitters
MM Ebrahimi, M Helaoui - IEEE transactions on microwave …, 2013 - ieeexplore.ieee.org
This paper introduces two new techniques to enhance both efficiency and signal bandwidth
in delta-sigma-based transmitters. At first step, a technique called quantization noise …
in delta-sigma-based transmitters. At first step, a technique called quantization noise …
A 35 dBm output power and 38 dB linear gain PA with 44.9% peak PAE at 1.9 GHz in 40 nm CMOS
This paper presents a 1.9 GHz linear power amplifier (PA) architecture that improves its
power efficiency in the power back-off (PBO) region. The combination of power transistor …
power efficiency in the power back-off (PBO) region. The combination of power transistor …