Gaussian minimum shift keying modulator [for satellite communication]

Tsai, Kuang; Oyang, T.; Phan, J.; Yang, C.C.; Schneier, N.J.

doi:10.1109/aero.2000.878495

Cited by 4 publications

(3 citation statements)

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“…GMSK is a modulation technique widely employed in terrestrial telephony [16], in particular in the GSM standard. More recently, GMSK found some interesting applications in satellite communications ( [17] [18]). GMSK is derived by Minimum Shift Keying (MSK) signal that is a form of Offset-QPSK signaling with sinusoidal pulse shaping [10].…”

Section: The Idea Of Obtaining Gigabit Connectivity By Means Of W-banmentioning

confidence: 99%

Efficient Waveform Design for High-Bit-Rate W-band Satellite Transmissions

Sacchi

Rossi

Ruggieri

et al. 2011

IEEE Trans. Aerosp. Electron. Syst.

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In the EHF (Extremely High Frequency) domain, W-band (75-110 GHz) offers promising perspectives for future satellite communications, mainly in terms of large bandwidth availability for high-bit-rate transmission. In this work 1 , an innovative physical (PHY) layer design for broadband satellite connections operating in W-band is proposed, which is based on the Prolate Spheroidal Wave Functions (PSWFs). PSWF waveforms (originally proposed in short-range indoor Ultra Wideband (UWB) communications) are aimed at optimizing the tradeoff between the concentration of pulse energy in a finite time interval and in a limited bandwidth. In our paper, PSWF-based 4-ary PSM modulation, characterized by a nearoptimal compromise between spectral and envelope compactness, has been tested for the radio interface of a W-band geostationary (GEO) downlink connection. The effect of nonlinear distortions, introduced by power-efficient saturating amplifiers, can be drastically reduced without any power back-off and maintaining a very good spectral efficiency. Experimental results, obtained by means of realistic simulations, fully demonstrate the potential advantages taken by PSWF in terms of increased spectral efficiency, link availability and net payload rate with respect to state-of-the-art pulse-shaped modulations (raised-cosine filtered QAM and Gaussian Minimum Shift Keying), commonly employed in satellite communications.

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Section: The Idea Of Obtaining Gigabit Connectivity By Means Of W-banmentioning

confidence: 99%

Efficient Waveform Design for High-Bit-Rate W-band Satellite Transmissions

Sacchi

Rossi

Ruggieri

et al. 2011

IEEE Trans. Aerosp. Electron. Syst.

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“…Böylece modülatör çıkışının spektrumundaki yan kulakçıkların genliğinde azalma gözlemlenir ve bu yapı sayesinde komşu kanal girişine (ACI) daha fazla direnç sağlar. Modülasyon sürekli olduğundan dolayı iletilen her sembol bir önceki sembole bağımlıdır, bununla beraber hafıza gereksinimi doğar [4]. Spektral etkinliği ve sabit zarfı sayesinde Mobil Haberleşmeler için Avrupa Küresel Sistemi (GSM) standardı tarafından kabul edilmiştir.…”

Section: Gmsk Modülasyonuunclassified

Design of GMSK modulated software defined radio for nano-satellites

Dilek

Bayram

Safak

et al. 2011

2011 IEEE 19th Signal Processing and Communications Applications Conference (SIU)

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ÖZETÇEBu bildiride, nano uydularda kullanılabilecek GMSK modülasyonlu YTR ( Yazılım tanımlı Radyo ) tasarımı anlatılmaktadır. Yapı içerisinde farklı BT değerleri (0,3, 0,5, 0,7,1) ile kontrol edilebilir Gaussian FIR süzgeç birimi oluşturulmuştur. Cyclone II FPGA üzerinde çalışan süzgeç, integral alıcı ve DDS (Doğrudan Sayısal Sentezleyici) yapıları ile elde edilen sayısal çıkış verisi analog işarete çevrildikten sonra RF devreler yardımı ile istenilen frekansa ve güce yükseltilerek antene aktarılır. Cyclone II içerisinde bulunan PLL ile mevcut saat işareti arttırılarak sisteme 150MHz saat darbesi verilmiş ve çıkışta 2,3 MHz merkez frekanslı GMSK modülasyonlu işaret elde edilmiştir. Elektronik devreler gerçek devre elemanı modelleri kullanılarak AWR-VSS ile tasarlanmış ve benzetim sonucunda 433MHz 100mW işaret elde edilmiştir. ABSTRACTIn this paper, the construction of GMSK modulated SDR ( Software defined radio ) design which could be processed in nano-satellites is discussed. A Gaussian FIR filter which is controllable and has the coefficients arranged with different BT values (0.3, 0.5, 0.7, and 1.0) has been formed. After the filter which works on the Cyclone II FPGA has been transformed into analog signal with the data DAC IC which has been obtained with integrator and DDS structures, it is transmitted to the antenna by being amplified to the desired frequency and power with RF circuits. The clock of 150 MHz has been inputted into the system by the frequency which is augmented by PLL in Cyclone II. The output of 2.3 MHz has been obtained. The electronics circuits of the system have been designed with real circuit models and AWR-VSS which is a RF simulation program and it is also shown that the output of 433 MHz and 100 mW power has been obtained in the simulation.

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“…But in direct phase decomposing method, a set of phase trajectories have already been predicted and stored in ROM to generate the modulated signal by passing through the phase-to-magnitude converter (Yunfu et al, 2007). Implementation of GMSK modulator has been carried out in ASIC platform (Bodas and Feher, 1996;Cardarilli et al, 2002;Tsai et al, 2000a;Haspeshlagh et al, 1990) by Digital Signal Processors (DSPs) Venkataraman and Collins, 2005;Souisi et al, 2008;Sebesta and Kasal, 2003) as well as FPGA boards (Gurubelli et al, 2009;Liu and Liu, 2008).…”

Section: Introductionmentioning

confidence: 99%

Programmable Common Baseband Modulator for Software Defined Radio system

Hatai

Chakrabarti

2011

IJSISE

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In Software Defined Radio (SDR), a single hardware structure can be reused to conform to different standards by simply changing some parameter. A low-power, high-speed, low-area parameter-controlled Common Baseband Modulator (CBM) architecture has been proposed in this paper. Using control parameters, the proposed CBM can be configured to support Gaussian Minimum Shift Keying (GMSK) as well as Frequency Modulation (FM) schemes. The design, which is fully pipelined, can operate at a maximum data rate of 276 Mbps. The proposed CBM consumes maximum dynamic power of 108.41 mW when running at 100 Mbps and using only 22.7 kilo equivalent gates.

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Gaussian minimum shift keying modulator [for satellite communication]

Abstract: Modem satellite systems must transmit ever increasingly large amounts of digital data.

Cited by 4 publications

References 0 publications

Efficient Waveform Design for High-Bit-Rate W-band Satellite Transmissions

Efficient Waveform Design for High-Bit-Rate W-band Satellite Transmissions

Design of GMSK modulated software defined radio for nano-satellites

Programmable Common Baseband Modulator for Software Defined Radio system

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