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• W2140202217 abstract "Since the superregenerative (SR) receiver was invented by E. H. Armstrong in 1922 (Armstrong, 1922), it has been used in myriad applications. In the 1930s, it came into widespread use by radio amateurs as an economical communications receiver. Various walkie-talkie communications devices were developed based on SR receivers, exploiting their light weight and low cost. With the advent of World War II, the circuit was mass-produced as a pulse responder for radar identification of ships and aircraft (Identification, Friend or Foe (I.F.F.)) (Whitehead, 1950). As the transistor replaced the vacuum tube, the superheterodyne receiver, characterized by improved selectivity, relegated SR receivers to very specific applications, such as altitude and Doppler radar (Levanon et al., 1974; Milner & Shell, 1968), and solar-powered devices (McCoy, 1992). Superregenerative receivers have also harnessed for optical communications (Espana & Puerta, 1999). Currently, SR receivers are chiefly used in short-distance radiofrequency (RF) links, which demand low cost and low power consumption. These include remote control systems (e.g. garage-door openers, robotics, and radio-controlled toys), short distance telemetry, and wireless security (Hickman, 2002; Telecontrolli, 2011). These receivers are typically used as narrowband AM receivers and, occasionally, as FM receivers. Superregenerative receivers have recently garnered renewed attention for their integration into CMOS, which, when combined with modern digital techniques in mixed-signal designs, improves performance implementations (Favre et al., 1998; Chen et al., 2007). Thus, SR receivers are a promising alternative to other architectures in emerging applications such as wireless sensor networks and medical devices (Ayers et al., 2010, Bohorquez et al., 2009; Otis et al., 2005). Recent proposals for their use include: reception of spread spectrum, phase and frequency modulations (Ayers et al. 2010, Moncunill et al., 2005b; Pala et al., 2009); use of stable frequency references such as bulk-acoustic-wave (BAW) resonators (Otis et al., 2005); implementation of digital self-calibrating techniques (Chen et al., 2007); and, very recently, reception of ultra wideband impulse radio (UWB IR) modulations (Anis et al., 2008; Moncunill et al., 2007b; Moncunill et al., 2009; Pelissier et al., 2009; Thoppay, 2010). In this chapter, we analyze the suitability of SR receivers for UWB IR communications. In Section 2, we provide basic concepts on the principle of superregeneration. In Section 3, we present several SR architectures and assess their amenability to UWB IR signal detection. In Section 4, we characterize the superregenerative oscillator as a pulse filter and amplifier with characteristic parameters and functions. In Section 5, we outline the features that" @default.
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• W2140202217 date "2011-07-27" @default.
• W2140202217 modified "2023-10-01" @default.
• W2140202217 title "Ultra Wideband Impulse Radio Superregenerative Reception" @default.
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• W2140202217 doi "https://doi.org/10.5772/18707" @default.
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