All Programmable RF Sampling Solutions White Paper (WP489)
ثبت نشده
چکیده
To achieve the performance required of the latest generation of wireless access, DOCSIS, and a plethora of other radio applications, direct RF-sampling technology holds the promise of increased flexibility and higher performance. Direct RF-sampling provides the flexibility by moving much of the RF signal processing into the digital domain, thereby eliminating much of the analog signal processing[Ref 1][Ref 2]. However, there is immense market pressure to reduce the power and footprint of these systems. The solution is to integrate RF-sampling data converters with VLSI devices using advanced CMOS technology. Xilinx® All Programmable technology has long provided a highly flexible digital signal processing solution for a range of radio applications[Ref 3][Ref 4]. Integrating direct RF-sampling data converters enables a highly flexible platform for radio development that also addresses many of the challenges associated with current direct RF-sampling solutions.
منابع مشابه
An All Digital Qam Modulator with Radio Frequency Output
A software defined radio (SDR) terminal promotes programmable realizations of the physical layer functionalities. A lot of research work has been done in applying digital signal processors (DSP) and field programmable gate arrays (FPGA) to implement the baseband functionalities of the physical layer. In this paper, the programmable solutions are extended to the radio frequency (RF) band for the...
متن کاملDirect downconversion of multiple RF signals using bandpass sampling
The center idea behind the software radio architecture is to place analog-to-digital and digital-to-analog converters as near the antenna as possible, leaving the implementation of the most radio functionality to a programmable micro or signal processor. One way to accomplish this in a radio receiver front end is by direct downconverting the desired radio frequency (RF) signal to a target inter...
متن کاملControl Theory for RF Feedback and Longitudinal Beam Stability
Progress in digital hardware solutions such as field programmable gate arrays (FPGA) has raised the question of how to design the algorithms of RF feedback. This especially applies to the feedback of the RF cavities and the longitudinal beam feedback for SIS100. For example, FPGAs currently allow FIR (finite impulse response) filter lengths of several tens of taps. This number of degrees of fre...
متن کاملRF gain control in direct conversion receivers
This paper presents a study of LO selfmixing and RF gain control issues in direct conversion receivers. In cellular systems, that use continuous time frequency duplexing, these can constitute serious problems. The presented topic is of special importance when digitally programmable gain is implemented at the RF frequencies before the downconversion mixers, practically in the LNA. Furthermore, t...
متن کاملDirect Up-conversion Using an Fpga-based Polyphase Modem
1. ABSTRACT Performance requirements for broadband modems continue to push the limits of analog technology. Fortunately, today’s digital–to-analog converters (DACs) are approaching sampling rates in the gigahertz range. These DACs allow broadband modems to implement multichannel solutions completely in the digital domain. To fully utilize the available bandwidth of these DACs, new techniques in...
متن کامل