A novel digital FM receiver for mobile and personal communications

Kwon, Hyuck M.; Lee, Kwang Bok

doi:10.1109/26.544463

Cited by 37 publications

(21 citation statements)

References 8 publications

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“…In the ZigBee receiver, the sensitivity shall be below or equal to -85 dBm to reach an SER of 2~4×10 -4 [1] . Seen from Fig.6, this implies that E b /N 0 must equal to 9.5 dB in AZCD [15] , 13 dB in ZIFZCD [12][13][14] , 12 dB in PQD [16] . So, in view of reaching required SER, the proposed demodulator will be at least 0.7 dB better than AZCD.…”

Section: Simulation Resultsmentioning

confidence: 99%

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A new low-cost demodulator for 2.4 GHz ZigBee receivers

Meng

Xiao

et al. 2009

J. Electron.(China)

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A new low-cost demodulator for ZigBee receivers satisfying requirements of IEEE802.15.4 standard is presented, which is designed for ISM 2.4 GHz band and based on Zero-IF receivers. This demodulator extracts symbols directly from baseband signal rather than recovering PN code chips, so its structure is simple. Two main techniques are used to improve the performance of demodulator. One is Phase-Axis Crossing Detector (PACD) which detects the phase correlation of baseband signal. The other is symbol synchronization and sampling clock correction algorithm. The result shows that this demodulator performance, Symbol Error Rate (SER) and Packet Error Rate (PER) meet IEEE 802.15.4TM standard requirements and the demodulator can handle frequency offset in excess of 200 kHz, involving a Zero-IF receiver with a Noise Figure (NF) lower than 17 dB, which is easily implemented in standard CMOS technology.

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Section: Simulation Resultsmentioning

confidence: 99%

“…Usually, two kinds of digital demodulating technique for MSK signal are respectively introduced in 1 Refs. [12][13][14]. One is coherent demodulator, which is better for lower Bit Error Rate (BER).…”

Section: Introductionmentioning

confidence: 99%

A new low-cost demodulator for 2.4 GHz ZigBee receivers

Meng

Xiao

et al. 2009

J. Electron.(China)

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“…Such receivers were proposed by Lee [32,33] and his co-authors Kwon [34], Hou [35] and Hyun [36]. The basic structure of their zero-IF zero-crossing detector is decpicted in Figure 1 of Reference [32].…”

Section: Related Workmentioning

confidence: 99%

Intermediate frequency zero‐crossing detection of filtered MSK based on irregular sampling

Scholand

Jung

2007

Trans Emerging Tel Tech

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SUMMARYShort range communication systems such as Bluetooth and DECT (Digital Enhanced Cordless Telecommunications) deploy Gaussian frequency shift keying (GFSK), which is a continuous phase modulation (CPM) scheme derived from minimum shift keying (MSK). Since these short range communication systems require low-cost transceiver structures, the development of appropriate receiver techniques has been a major research topic. Particularly, analogue limiter-discriminator-integrator (LDI) dump filtering techniques have received considerable attention. With the availability of digital signal processing (DSP), the digital implementation of LDI techniques has become increasingly attractive. In order to make LDI receivers more accessible, zero-crossing detection was proposed. First, the authors shall focus on the establishment of an appropriate mathematical discrete-time system model, taking bandlimiting receiver filters into account explicitly. This system model serves as the basis for the development of a multitude of digital zero-crossing detection techniques. Starting from this mathematical discrete-time system model, the authors shall focus on a novel, yet promising, approach to digital zero-crossing detection in the intermediate frequency domain, using irregular sampling instead of the commonly employed regular sampling. The novel detectors shall be termed zero-crossing decorrelation detectors (ZXDDs), because a decorrelating approach will be used. The authors shall present three different variants of the ZXDD. The performance of these ZXDD schemes has been analysed in simulations by the authors and obtained results shall be presented and compared to the performance of known LDI and zero-crossing detection based techniques.

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“…The phase rotation detector generates further analog baseband signals which are phase rotated versions of the input I and Q signals. This is mandatory for narrow-band FM systems, e.g., binary CPM with modultion index values of 0.5 and below because such systems may not exhibit any zero-crossing during a bit period when only taking the original I and Q signals into account [30,31]. This disadvantage can be overcome when in total 2 a , a ∈ {2, 3, .…”

Section: Introductionmentioning

confidence: 95%

“…Such receivers were proposed by Lee [29,30] and his co-authors Kwon and Lee [31], Lee et al [32] and Kwon et al [33]. The basic structure of their zero-IF zero-crossing detector (ZIZCD) is decpicted in Figure 1 of [29].…”

Section: Introductionmentioning

confidence: 98%

A Real-Time Zero-Crossing Demodulation Concept

Scholand

Spiegel

Waadt

et al. 2006

Wireless Pers Commun

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Short range communication systems such as Bluetooth and Digital Enhanced Cordless Telecommunications require low-cost transceiver structures. Hence, the development of appropriate receiver techniques has been a major research topic. Particularly, analog limiter-discriminator with integrate and dump filtering (LDI) techniques have received considerable attention. With the availability of digital signal processing, the digital implementation of LDI techniques has become increasingly attractive. In order to make LDI receivers more accessible, zero-crossing detection was proposed. In this communication, the authors shall focus on a novel, yet promising, approach to digital zero-crossing detection in the intermediate frequency domain. Zero-crossing demodulation is an irregular sampling technique, which replaces the commonly employed regular, i.e. temporally equidistant sampling technique in the mentioned low-cost receivers. In this manuscript, a real-time capable receiver concept deploying zero-crossing demodulation shall be presented. First, the authors shall present the theoretical aspects of zero-crossing demodulation with special focus on both Bluetooth Basic Rate and Bluetooth Enhanced Data Rate. Next, the obtained performance results in terms of the bit error ratio shall be given.Keywords: π /4-Shifted differential quadrature phase shift keying, bluetooth, bluetooth basic rate, Bluetooth enhanced data rate, continuous phase modulation, differential phase shift keying, digital enhanced cordless telecommunications, frequency modulation, Gaussian frequency shift keying, minimum shift keying, octal differential phase shift keying, real-time implementation, zero-crossing demodulation.

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A novel digital FM receiver for mobile and personal communications

Cited by 37 publications

References 8 publications

A new low-cost demodulator for 2.4 GHz ZigBee receivers

A new low-cost demodulator for 2.4 GHz ZigBee receivers

Intermediate frequency zero‐crossing detection of filtered MSK based on irregular sampling

A Real-Time Zero-Crossing Demodulation Concept

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