Averaging with Digital Demodulation
In general, averaging is not available for demodulated trace data in Digital Demod, except for RMS averaging on pre-demodulated spectrum trace data. Averaging may be applied to most numeric-error data in the Error Summary table as it applies to each demodulation format:
- (Video) and computes a linear or exponential average of each RMS error update in the error summary table (Peak error data is not averaged).
- (Video) and is like (video) and , except that averaging continues past the average count with an exponential weight (does not average peak error data).
- saves and shows the greatest measured error result for each update to the error summary table trace. These values can be either the largest or minimum error value depending on the particular error result, for example, the greatest EVM Error vector magnitude (EVM): A quality metric in digital communication systems. See the EVM metric in the Error Summary Table topic in each demodulator for more information on how EVM is calculated for that modulation format. error result is the maximum value and for SNR Signal-to-Noise Ratio(MER) the greatest error result is the minimum value.
Specific averaging information for each demodulation format is found in the following topics:
- 1xEV-DO Demodulation
- 5G NR
- cdma2000 Demodulation
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Channel Quality
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Custom IQ
- Digital Demodulation
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DOCSIS 3.1 Downstream Demodulation
- GSM Global System for Mobile Communications: Originally developed as a pan-European standard for digital mobile telephony, GSM has become the world’s most widely used mobile system. It is used on the 900 MHz and 1800 MHz frequencies in Europe, Asia and Australia, and the 1900 MHz frequency in North America and Latin America./EDGE Enhanced Data for Global Evolution: A technology that gives GSMA and TDMA similar capacity to handle services for the third generation of mobile telephony. EDGE was developed to enable the transmission of large amounts of data at a high speed, 384 kilobits per second. (It increases available time slots and data rates over existing wireless networks.)/EDGE Evo
- IEEE Institute of Electrical and Electronics Engineers. A US-based membership organisation that includes engineers, scientists, and students in electronics and related fields. The IEEE developed the 802 series wired and wireless LAN standards. Visit the IEEE at http://www.ieee.org 802.11a/g/j/p DSSS Direct sequence spread spectrum. The data transmission scheme (sometimes referred to as a "'modulation" scheme) used in 802.11b WLANs. DSSS uses a radio transmitter operating at a fixed centre frequency, but using a relatively broad range of frequencies, to spread data transmissions over a fixed range of the frequency band. 802.11a and 802.11g (when not operating in 802.11b mode) use Orthogonal Frequency Division Multiplexing (OFDM)./CCK complementary code keying/PBCC packet binary convolutional code OFDM Demodulation
- IEEE 802.11b/g MIMO Multiple Input, Multiple Output: A physical layer (PHY) configuration in which both transmitter and receiver use multiple antennas. Demodulation
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IEEE 802.11n/ac Demodulation
- IEEE 802.16 OFDM Demodulation
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IEEE 802.16 OFDMA Demodulation
- LTE Demodulation
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LTE-Advanced Demodulation
- TD-SCDMA Demodulation
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TEDS (TETRA Trans-European Trunked Radio. A communications system standard. 2) Demodulation
- W-CDMA Code Division Multiple Access: One of several digital wireless transmission methods in which signals are encoded using a specific pseudo-random sequence, or code, to define a communication channel. A receiver, knowing the code, can use it to decode the received signal in the presence of other signals in the channel. This is one of several "spread spectrum" techniques, which allows multiple users to share the same radio frequency spectrum by assigning each active user an unique code. CDMA offers improved spectral efficiency over analog transmission in that it allows for greater frequency reuse. Other characteristics of CDMA systems reduce dropped calls, increase battery life and offer more secure transmission. See also IS-95.(3GPP) Demodulation
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