A universal low-noise analog receiver baseband in 65-nm CMOS

In this paper, a novel universal receiver baseband approach is introduced. The chain includes a post-mixer noise shaping blocker pre-filter, a programmable-gain post mixer amplifier (PMA) with blocker suppression, a differential ramp-based novel linear-in-dB variable gain amplifier and a Sallen–Key output buffer. The 1.2-V chain is implemented in a 65-nm CMOS process, occupying a die area of 0.45 mm2. The total power consumption of the baseband chain is 11.5 mW. The device can be tuned across a bandwidth of 700-KHz to 5.2-MHz with 20 kHz resolution and is tested for two distinct mobile-TV applications; integrated services digital broadcasting-terrestrial ISDB-T (3-segment f c = 700 kHz) and digital video broadcasting-terrestrial/handheld (DVB-T/H f c = 3.8 MHz). The measured IIP3 of the whole chain for the adjacent blocker channel is 24.2 and 24 dBm for the ISDB-T and DVB-T/H modes, respectively. The measured input-referred noise density is 10.5 nV/sqrtHz in DVB-T/H mode and 14.5 nV/sqrtHz in ISDB-T mode

Noise minimization in RC-active filters using generalized impedance converters

A procedure has been given for minimizing the total output noise of a Generalized Impedance Converter (GIC), subject to constraints dictated by signal handling capability of the Operational Amplifiers and ease of microcircuit fabrication. The noise reduction is achieved only by the adjustment of RC elements of the GIC, and the total output noise after optimization in the example cited is close to the theoretical lower limit. The output noise of a higher-order filter can be reduced by RC-optimizing the individual GIC's of the active realization. Experimental results on a 20–24 kHz channel bank band-pass filter demonstrate the effectiveness of the above procedure

An Overview of multi-dimensional RF signal processing for array receivers

In this review paper, recent advancements in multidimensional (MD) spatio-temporal signal processing for highlydirectional radio frequency (RF) antenna array based receivers are discussed. MD network-resonant beamforming filters having infinite impulse response (IIR) and recursive spatio-temporal signal flow graphs are reviewed. The concept of MD networkresonant pre-filtering is described as a modification to existing phased/timed array beamforming back-ends to achieve improved side-lobe performance in the array pattern, leading to better interference rejection capabilities. Both digital and analog signal processing models are described in terms of their system transfer functions and signal flow graphs. Example MD frequency response and RF antenna array pattern simulations are presented

Hybrid Organizations in the Italian Regional Context: A Case Study from the Cultural Heritage Industry

This chapter deals with a case study located in the context of cultural heritage industry. The organization under scrutiny is a Regional entity for Cultural Heritage acting in one of the Italian Southern Regions, established in 2003. Since 2016, the organization under scrutiny was transformed into an in-house company entirely controlled by the regional government, switching from a public-private company to a company whose sole shareholder is the Region. In this chapter, we analyze the organizational hybridity from a twofold perspective: first, with reference to forms of governance model, and, second, we witness the paradox of a publicly owned organization which had to work in dynamic and project-oriented settings and under “private” constraints and regulations, while adhering to a more rigid regulative framework typical of public contexts

Hybrid Organizations in the Italian Regional Context: A Case Study from the Cultural Heritage Industry

This chapter deals with a case study located in the context of cultural heritage industry. The organization under scrutiny is a Regional entity for Cultural Heritage acting in one of the Italian Southern Regions, established in 2003. Since 2016, the organization under scrutiny was transformed into an in-house company entirely controlled by the regional government, switching from a public-private company to a company whose sole shareholder is the Region. In this chapter, we analyze the organizational hybridity from a twofold perspective: first, with reference to forms of governance model, and, second, we witness the paradox of a publicly owned organization which had to work in dynamic and project-oriented settings and under “private” constraints and regulations, while adhering to a more rigid regulative framework typical of public contexts

Scanned–array audio beamforming using 2nd− and 3rd–order 2D IIR beam filters on FPGA

Real-time scanned-array direct-form-I hardware implementations of two-dimensional (2D) infinite impulse response (IIR) frequency-planar beam plane-wave (PW) filters have potentially wide applications in the directional enhancement of spatio-temporal broadband PWs based on their directions of arrival (DOAs). The proposed prototypes consist of a microphone sensor array, low-noise-amplifiers (LNAs), multiplexers (MUXs), a programmable gain amplifier (PGA), an analog to digital converter (ADC), a digital to analog converter (DAC), and a field programmable gate array (FPGA) circuit based 2D IIR spatiotemporal beam filter implemented on a single Xilinx Virtex2P xc2vp30-7ff896 FPGA chip. Starting from published 1st-order designs, novel FPGA architectures for highly-selective 2nd- and 3rd-order beam PW filters are proposed, simulated, implemented on FPGA, and verified on-chip