Multi-port front-end and transceivers for V-band multi-gigabit/s communication systems

Tatu, Serioja Ovidiu; Moldovan, E.; Affes, Sofiène

doi:10.1017/cbo9780511744839.025

Cited by 15 publications

(25 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 We note that, if the circuit is used as a low IF downconverter, a second in-phase down-conversion and lowpass filtering is required [7].…”

Section: Multiport Down-conversion and Direct Demodulationmentioning

confidence: 99%

“…One of earlier implementations of this multiport module, As presented in [7], if the inputs signals for LO and RF are (1) and 6 = ( ) ( + 6 ( )) (2) the output IF signals read…”

Section: Multiport Down-conversion and Direct Demodulationmentioning

confidence: 99%

“…If the signal frequency fRF is known, the distance d between antenna and target can be reconstructed according to (7). The path difference between reference and received signal is represented by the phase difference φ between both signals and, therefore, easily detectable by a six-port network.…”

Section: (V) Q (V) I (V)mentioning

confidence: 99%

“…They don't involve any calibration or impairment compensation before getting to the signal's complex envelope detection. The use of un-calibrated multiport receivers assume that the gains through the two paths RF inputs to b1 and b3 (similarly between RF inputs to b2 and b4) are quasi identical and also that the phase shifts are multiple of 90°, as demonstrated in multiport theory [7]. This approach involves a very accurate design of multiport circuits over the entire frequency band of operation and cannot be avoided for low power applications or applications with high datarates that surpass the limits of today's DSP.…”

Section: Multiport Wideband Receiver Calibration and Impairment MImentioning

confidence: 99%

“…The S parameter matrix of the multiport circuit reveals that there are two clusters of ports, 1 to 4 and, 5 and 6. Inside each cluster, all the ports are perfectly matched and isolated one versus the others [7]. In all applications they play separate functions, such as: four outputs and, respectively, two RF inputs for down-conversion, or four control inputs and RF output/input for direct modulators.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Multiport Technology: The New Rise of an Old Concept

et al. 2014

Self Cite

View full text Add to dashboard Cite

Abstract-A short review of the multiport (six-port) theory for modern applications in downconversion, direct demodulation or modulation of RF signals, and new measurement techniques for localization is presented in this paper. More than four decades ago, the circuit was developed for low-cost S-parameter measurements of microwave circuits. The modifications required to transform original six-port instrument function to radio function was not obvious in the beginning. In this purpose, several innovations have been implemented during the last two decades. Implementations of the circuit in various mature fabrication technologies, covering frequencies from microwave to millimeter wave spectrum, are presented and discussed. Multiport receiver calibration and impairment mitigation techniques are also proposed at frequencies where analog-to-digital converters and digital signal processing are available.

show abstract

“…1 We note that, if the circuit is used as a low IF downconverter, a second in-phase down-conversion and lowpass filtering is required [7].…”

Section: Multiport Down-conversion and Direct Demodulationmentioning

confidence: 99%

“…One of earlier implementations of this multiport module, As presented in [7], if the inputs signals for LO and RF are (1) and 6 = ( ) ( + 6 ( )) (2) the output IF signals read…”

Section: Multiport Down-conversion and Direct Demodulationmentioning

confidence: 99%

Section: (V) Q (V) I (V)mentioning

confidence: 99%

Section: Multiport Wideband Receiver Calibration and Impairment MImentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Multiport Technology: The New Rise of an Old Concept

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

Highly Efficient Front End Direct Conversion Receiver for 28-GHz Wireless Access Point

et al. 2021

Self Cite

View full text Add to dashboard Cite

The manuscript presents the design and characterization of a wideband front-end receiver, based on hollow waveguide technology, for the wireless access point (WAP) applications. The Ka-band receiver is comprised of a low-loss beam-switching antenna network (BSAN) with two-dimensional (2D) scanning property. For demodulation, the receiver uses an efficient six-port network (SPN) that is composed of four 90º hybrid couplers and a 90º phase shifter. To suppress the phase imbalance on the entire band of interest, 27 GHz to 33 GHz, a frequency-independent phase shifter with a minimum phase error is suggested. The SPN receiver is integrated with antenna-in-package in waveguide technology to decrease the insertion losses and noise levels at the first stages. To determine the SPN phase errors, a theoretical and experimental analysis of real-time wireless data transmission utilizing phase-shift keying (PSK) and quadrature amplitude modulated (QAM) signal is conducted. Besides, channel capacity along with beamformer influence on channel performance improvement are determined.INDEX TERMS Antenna array, beam-switching antenna network (BSAN), direct modulation, homodyne receiver, phase-shift keying (PSK), six port network (SPN), wireless access point (WAP).

show abstract

A Hybrid LSTM-ResNet Deep Neural Network for Noise Reduction and Classification of V-Band Receiver Signals

et al. 2022

Self Cite

View full text Add to dashboard Cite

Noise reduction is one of the most important process used for signal processing in communication systems. The signal-to-noise ratio (SNR) is a key parameter for minimizing the bit error rate (BER). The inherent noise in millimeter-wave systems is mainly a combination of white and phase noise. Increasing the SNR can lead to reliability and performance improvements in wireless data transfer systems. To address this issue, we propose to use a recurrent neural network (RNN) with a long shortterm memory (LSTM) autoencoder architecture to achieve signal noise reduction. This design is based on a composite LSTM autoencoder with a single encoder layer and two decoder layers. A V-band receiver test bench is designed and fabricated to provide a high-speed wireless communication system. Constellation diagrams display the output signals measured for various random sequences of PSK and QAM modulated signals. The LSTM autoencoder is trained in real time using various noisy signals. The trained system is then used to reduce noise levels in the tested signals. The SNR of the designed receiver is of the order of 11.8 dB and it increases to 13.66 dB using the three-level LSTM autoencoder. Consequently, the proposed algorithm reduces the bit error rate from 10 8 to 10 11 . The performance of the proposed algorithm is comparable to other noise reduction strategies. Augmented denoised signals are fed into a ResNet-152 deep convolutional network to perform the final classification. The demodulation types are classified with an accuracy of 99.93%. This is confirmed by experimental measurements.

show abstract

Multi-port front-end and transceivers for V-band multi-gigabit/s communication systems

Cited by 15 publications

References 15 publications

Multiport Technology: The New Rise of an Old Concept

Multiport Technology: The New Rise of an Old Concept

Highly Efficient Front End Direct Conversion Receiver for 28-GHz Wireless Access Point

A Hybrid LSTM-ResNet Deep Neural Network for Noise Reduction and Classification of V-Band Receiver Signals

Contact Info

Product

Resources

About