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The modulation used in GSM is Guassian minimum-shift keying (GMSK), a kind of continuous-phase frequency shift keying. In GMSK, the signal to be modulated onto the carrier is first smoothed with a Guassian low-pass filter prior to being fed to a frequency modulator, which greatly reduces the interference to neighboring channels (adjacent channel interference).
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QPSK
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Why gmsk is used for gsm?
GMSK for GSMGMSK is used in GSM because it provides good spectral efficiency. i think 8-psk modulation is also used..... for edge hardware.Well the reason GMSK is used for GSM.1. High spectral Efficiency2. Since Basic MSK uses Phase variations for modulation so better immune to noise.3.Use of non-linear amplifiers at receivers can be utilized since the information is stored in phase variations rather than amplitude, Non-linear amplifiers give better response and consume less power so low battery usage which is a important parameter in Cellular technology.
Why is source modulation used in atomic absorption spectroscopy?
Source modulation is employed to distinguish between atomic absorption (an ac signal) and flame emission (a dc signal).
How can infrared be used to communicate information?
pulse code modulation is one way. its what your TV remote uses.
What is FM?
FM stands for frequency modulation. The definition is: when the frequency of the carrier wave is changed in accordance with the intensity of the signal, it is called frequency modulation. In frequency modulation, only the frequency of the carrier wave is changed in accordance with the signal. However, the amplitude of the carrier wave remains unchanged.
What is pwm?
PWM is Pulse Width Modulation. It is a Digital control is used to create a square wave, a signal switched between on and off.
Which modulation technique is used in gsm?
GSM uses GMSK modulation scheme. GPRS also uses GMSK modulation scheme. EDGE and UMTS uses 8-PSK.
What type of modulation is used to carry the picture portion of a television signal?
Amplitude Modulation (AM) is used for the picture portion of a television transmission while Frequency Modulation (FM) is used for the audio portion.
What type of antenna is used in gsm and CDMA?
http://www.ehow.com/list_7279317_types-gsm-antennas.html
What does Base stand for in 100BaseT?
"Base band", meaning that no modulation is used."Base band", meaning that no modulation is used."Base band", meaning that no modulation is used."Base band", meaning that no modulation is used.
What type of modulation is pulse position modulation and why?
It is a type of Pulse modulation as in PPM the position of pulse of carrier pulse train is varied in accordance with the modulating signal.
What are the Uses of modulation techniques in telecommunication?
In GSM generally GMSK which is a derivative of MSK is beeing used because of its spectral efficiency and more noise resistant. Regards Sumeer Mehaboob
What is the type of current used by GSM Telecom Equipment?
dc
Where is delta modulation used?
Adaptive delta modulation is used in audio communication systems to avoid the two drawback of delta modulation.
What modulation is used in telegraphy system?
pulse code modulation method used a telephony.
Where is adaptive delta modulation used?
Adaptive delta modulation is used in audio communication systems to avoid the two drawback of delta modulation.
How many type of modulation?
17
What type of modulation is used in ADSL2?
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