Multi-standard simulation of WLAN/UMTS/GSM transceivers for analog front-end validation and design
ABSTRACT A system-level multi-standard simulator is set up to help the architectural and circuit-level design of RF front-ends whose building blocks are meant to be shared between transceiver chains of different standards. The simulator distinguishes the baseband digital processing and analog processing. Non idealities of analog blocks are modeled in detail taking into account the nonlinearities, band limitation, losses, thermal noise, etc. The simulator provides all classical compliance tests (sensitivity, maximum input, adjacent channel rejection, pureness of modulation, spectral profile, etc.) and can also assess the joint effect of high-level analog design parameters on the performance of the transmission chain at bit- or packet- level.
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ABSTRACT: This paper describes a SIMULINK block set for the behavioral simulation of RF receivers. Building blocks are modeled including their main circuit-level non idealities. These models are incorporated into the SIMULINK environment making an extensive use of C-coded S-functions and reducing the number of library block elements. This approach reduces the simulation time while keeping high accuracy, what makes the proposed toolbox very appropriate to be combined with an optimizer for the automated high-level synthesis of radio receivers. As a case study, a direct-conversion receiver intended for 4G telecom systems is modeled and simulated using the proposed toolbox.Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on; 06/2007
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ABSTRACT: Mobile devices are widely used for a vast range of applications such as mobile phones,personal digital assistant, personal computers, video games console, etc. However, the performance of these devices is restricted by the support of the network and the mobile functionality and efficiency. Current applications require high data rates and global mobility which can be satisfied with the co-existence and handover between newly developed third generation (3G) or Universal Mobile Telecommunication System (UMTS) standard and current second generation (2G) standards including: Global Standards for Mobile (GSM), Digital Cellular System (DCS), and Personal Communication Systems (PCS). Therefore, recent research in wireless communication has shifted towards achieving a multi-standard terminal, which can support efficiently multiple standards including GSM/DCS/PCS/3G. In this research, the aim is to design and implement a new LNA for a multi-standard mobile receiver based on reconfigurability concept. This research was carried out in two major parts. The first part is to design and implement wide band multi-standard multiband LNAs for two bands of interest (lower frequency band – 800 to 1000 MHz and upper frequency band – 1800 to 2200 MHz). These two bands should cover most of the 2G and 3G standards currently in use worldwide. In this work, the design of LNA based on IDCS topology using wide band approach has been investigated, designed, implemented and approved by means of simulations, and measurement of fabricated ICs. The second part of this research, to develop a single reconfigurable multi-standard multi-band LNA is based on the design of the multi-standard multi-band LNAs. This LNA has the capability to function in two modes of operation, either at lower band or upper band of the 2G or 3G standards.
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ABSTRACT: This paper presents a SIMULINK block set for the behavioral modeling and high-level simulation of RF receiver front-ends. The toolbox includes a library with the main RF circuit models that are needed to implement wireless receivers, namely: low noise amplifiers, mixers, oscillators, filters and programmable gain amplifiers. There is also a library including other blocks like the antenna, duplexer filter and switches, required to implement reconfigurable architectures. Behavioral models of building blocks include the main ideal functionality as well as the following non-idealities: thermal noise, characterized by the noise figure and the signal-to-noise ratio, and non-linearity, represented by the input-referred second-order and third-order intercept points, IIP2 and IIP3, respectively. In addition to these general parameters, some block-specific errors have also been included, like oscillator phase noise and mixer offset. These models have been incorporated into the SIMULINK environment making an extensive use of C-coded S-functions and reducing the number of library block elements. This approach reduces the simulation time while keeping high accuracy, which makes the proposed toolbox very appropriate to be combined with an optimizer for the automated high-level synthesis of radio receivers. As an application of the capabilities of the presented toolbox, a multi-standard direct-conversion receiver intended for 4G telecom systems is modeled and simulated considering the building block requirements for the different standards.Integration, the VLSI Journal. 01/2008;