ICCSC'02. 1st IEEE International Conference on Circuits and Systems for Communications. Proceedings (IEEE Cat. No.02EX605)
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Các bài báo tiêu biểu
A fully differential CMOS OTA for continuous-time filter applications
- Trang 42-45
A CMOS operational transconductance amplifier (OTA) operating from single 3.3 V power supply is desirable for continuous-time filter applications. The developed OTA has been used in 100 kHz fifth-order, elliptic filter based on RLC ladder prototype. Input stage of OTA works as degenerated MOS differential pair with new concept of active MOS resistance. PSPICE (models BSIM3v3) simulations and measu......
#Filters #Transconductance #Operational amplifiers #Power amplifiers #Power supplies #Prototypes #SPICE #Semiconductor device modeling #Electrical resistance measurement #Semiconductor device measurement
Bit-wise demodulation for 16-QAM with BICM
- Trang 444-449
Bit-wise demodulation (BWD) is a novel demodulation method used in 16-QAM with BICM. Bit-interleaved coded modulation (BICM) proposed by Zehavi (1992) has proved to be capable of improving the performance of coded modulation over a Rayleigh fading channel by bit-wise interleaving at the encoder output, and using an appropriate soft-decision metric as an input to a Viterbi (1989) decoder. This pape......
#Demodulation #Modulation coding #Fading #Interleaved codes #Quadrature amplitude modulation #Decoding #Viterbi algorithm #Quadrature phase shift keying #AWGN #Constellation diagram
The synthesis of digital frequency and phase detectors
- Trang 174-177
The digital frequency and phase detectors synthesis method based on the splitting theory is considered. The comparison of results of processing by the offered detector and by its analogs is carried out. The detection probability is investigated in Gaussian noise. It is demonstrated, that the offered detectors have greater precision and noise stability, than their analogs.
#Frequency synthesizers #Phase detection #Phase frequency detector #Signal synthesis #Gaussian noise #Frequency modulation #Stability #Prototypes #Nonlinear equations #Multidimensional systems
Method coding of QAM signals for transmission fractional number bit per symbol
- Trang 198-201
In this paper a simple method of coding of fractional number bit per symbol from a point of view of computing expenditures is offered at QAM. The presentation is carried on with reference to case, when it is necessary to transmit the fourth part of bit per symbol. And apart from of the description of operation algorithm of the encoder and the decoder, the creation of signal and value of a power ga......
#Quadrature amplitude modulation #Modems #Decoding #Multidimensional systems #Signal design #Signal to noise ratio #Constellation diagram #1f noise #Stability #Partitioning algorithms
Hiệu suất của việc trải đều WCDMA trong đường xuống cho chế độ FDD Dịch bởi AI
- Trang 254-257
UMTS là tiêu chuẩn châu Âu của thế hệ thứ ba trong truyền thông di động và giao diện không khí của nó được gọi là WCDMA. Trong bài báo này, một hệ thống WCDMA đơn giản trong chế độ đường xuống và FDD được mô phỏng và các kết quả được trình bày. Mô phỏng, ngoài các chức năng của lớp vật lý như lớp 1, bao gồm điều chế dữ liệu, trải rộng kênh đa đường, tiếng ồn AWGN, giải điều chế dữ liệu, giải trải ......
#Multiaccess communication #Downlink #Multipath channels #AWGN #3G mobile communication #Communication standards #Mobile communication #Physical layer #Additive white noise #Gaussian noise
CAD of RF and microwave filters for wireless communications
- Trang 308-311
This paper presents the CAD of RF and microwave filters such as lumped element, combline and waveguide bandpass filters for wireless communication systems. A new high-Q periodic resonator has been used for combline filter applications. A significantly higher Q factor than that for a conventional combline resonator in the same volume has been achieved.
#Radio frequency #Microwave filters #Wireless communication #Resonator filters #Band pass filters #Insertion loss #Low pass filters #Chebyshev approximation #Q factor #Propagation losses
A low-voltage fully-differential BiCMOS op amp for polyphase filter
- Trang 46-49
This article presents a low-voltage fully-differential operational amplifier for a polyphase filter for mobile communication receivers. Due to a high gain-bandwidth 200 MHz and a low noise 6.7 nV//spl radic/(Hz) of the amplifier the filter spurious free dynamic range SFDR is 95 dB and a noise floor at the output is 15 /spl mu/V/sub rms/. The 5th order polyphase (10th order band pass) filter fabric......
#BiCMOS integrated circuits #Operational amplifiers #Band pass filters #Voltage #Dynamic range #Mirrors #Frequency #Bandwidth #Differential amplifiers #Resistors
Nonequilibrium 1/f noise and hardware reliability
- Trang 396-399
A method for the calculated estimation of the reliability of hardware elements is proposed, which does not require long testing of the experimental samples. Known effects are used: some interdependence (at least correlation) exists between the intensity of 1/f noise and non-failure operating time of electronic components. We suggest considering 1/f noise as fluctuations of reactive energy (of both......
#Hardware #Fluctuations #Magnetic noise #Capacitance #Frequency #Testing #Electronic components #Electric resistance #Stochastic resonance #Reactive power
Quantization of wavelet coefficients
- Trang 202-205
The wavelet coefficients quantization model is suggested in this paper. Quantization is represented as addition of noise by equal parts in all bands of the wavelet transform. The linear approximation model of dependence of quantizing distortion power from a quantizing interval is considered. It is shown that use of the pointed model allows increased efficiency of picture coding.
#Quantization #Wavelet coefficients #Frequency #PSNR #Image coding #Wavelet transforms #Interpolation #Discrete transforms #Hydrogen #Low-frequency noise
VLSI design of CMOS image-reject LNA for 950-MHz wireless receivers
- Trang 330-333
This paper presents the design of a CMOS integrated image reject low noise amplifier (IR-LNA) for application to 950 MHz low power, low voltage wireless receivers. A second-order active band-pass filter using an integrated inductor is incorporated into the LNA core to reject the 1.6 GHz image signal without achieving high Q values. The circuit proves to be suitable for highly integrated CMOS recei......
#Very large scale integration #CMOS technology #Low-noise amplifiers #Low voltage #Band pass filters #Active inductors #Wideband #Integrated circuit technology #Gain #Noise figure