G
Green Xenon [Radium]
- Jan 1, 1970
- 0
Hi:
What is the relationship between baud, bits-per-character, and
characters-per-second?
Carrying more bits-per-symbol saves bandwidth as opposed to using more
bauds-per-symbol.
Does carrying more bits-per-character use up less bandwidth than
carrying more characters-per-bit?
http://en.wikipedia.org/wiki/Baud
“Conveying more than one bit per symbol has advantages. It reduces the
time required to send a given quantity of data, and allows modern
modems, FDDI and 100/1000 Mbit/s Ethernet LANs, and others, to achieve
high data rates. An optimal symbol set design takes into account channel
bandwidth, desired information rate, noise characteristics of the
channel and the receiver, and receiver and decoder complexity. A typical
2400-bit/s modem transmits at 600 baud (600 symbol/s), where each
quadrature amplitude modulation symbol carries four bits of information.
1000 Mbit/s Ethernet LAN cables use many wire pairs and many bits per
symbol to encode their data payloads. 1000BASE-T uses four wire pairs
and two data bits per symbol to get a symbol rate of 125MBd.”
“Representing one bit by many symbols overcomes signal noise like radio
jamming, and is common in military radio and CDMA radio, including cell
phones, despite using more bandwidth to carry the same bit rate. In
these systems, each signal is called a "chip" and the baud the "chip rate".”
Unfortunately I don’t think this answers my question. Unless of course,
if symbols and characters are the same thing.
Are “bits-per-symbol” and “bits-per-character” the same thing? I did a
Google search for “bits-per-character” and “characters-per-second” but
didn’t see much in terms of telecommunications, baud and modems.
http://www.google.com/search?hl=en&q=bits-per-character&btnG=Search
http://www.google.com/search?hl=en&q="characters+per+second"&btnG=Search
OTOH, “bits-per-symbol” gave tons of links about telecommunications,
baud and modems.
http://www.google.com/search?hl=en&q=bits-per-symbol&btnG=Search
Thanks,
Radium
What is the relationship between baud, bits-per-character, and
characters-per-second?
Carrying more bits-per-symbol saves bandwidth as opposed to using more
bauds-per-symbol.
Does carrying more bits-per-character use up less bandwidth than
carrying more characters-per-bit?
http://en.wikipedia.org/wiki/Baud
“Conveying more than one bit per symbol has advantages. It reduces the
time required to send a given quantity of data, and allows modern
modems, FDDI and 100/1000 Mbit/s Ethernet LANs, and others, to achieve
high data rates. An optimal symbol set design takes into account channel
bandwidth, desired information rate, noise characteristics of the
channel and the receiver, and receiver and decoder complexity. A typical
2400-bit/s modem transmits at 600 baud (600 symbol/s), where each
quadrature amplitude modulation symbol carries four bits of information.
1000 Mbit/s Ethernet LAN cables use many wire pairs and many bits per
symbol to encode their data payloads. 1000BASE-T uses four wire pairs
and two data bits per symbol to get a symbol rate of 125MBd.”
“Representing one bit by many symbols overcomes signal noise like radio
jamming, and is common in military radio and CDMA radio, including cell
phones, despite using more bandwidth to carry the same bit rate. In
these systems, each signal is called a "chip" and the baud the "chip rate".”
Unfortunately I don’t think this answers my question. Unless of course,
if symbols and characters are the same thing.
Are “bits-per-symbol” and “bits-per-character” the same thing? I did a
Google search for “bits-per-character” and “characters-per-second” but
didn’t see much in terms of telecommunications, baud and modems.
http://www.google.com/search?hl=en&q=bits-per-character&btnG=Search
http://www.google.com/search?hl=en&q="characters+per+second"&btnG=Search
OTOH, “bits-per-symbol” gave tons of links about telecommunications,
baud and modems.
http://www.google.com/search?hl=en&q=bits-per-symbol&btnG=Search
Thanks,
Radium