This is a very nice forum and a lot of knowledgeable people here. I have a question don't know if any experts can share some thoughts on. If you are using GMSK over a wireless channel, and if you can choose only one feature to improve your system sensitivety, will you choose adaptive equalizer or channel coding? Which provides more benefit? GSM has both while DECT seems to have none.
Choose equalizer or channel coding?
Started by ●March 4, 2006
Reply by ●March 4, 20062006-03-04
in my opinion channel coding will be better. but it depends on your work . how much is realistic your work in terms of your application. do u familar space time coding ...... u can try !
Reply by ●March 4, 20062006-03-04
mguo wrote:> This is a very nice forum and a lot of knowledgeable people here. I have a > question don't know if any experts can share some thoughts on. > > If you are using GMSK over a wireless channel, and if you can choose only > one feature to improve your system sensitivety, will you choose adaptive > equalizer or channel coding? Which provides more benefit? > > GSM has both while DECT seems to have none.It depends on the channel response but lets pretend that it is AWGN. GMSK has controlled levels of ISI introduced to constrain the bandwidth of the signal. The BT of the Gaussian LPF is what determines the ISI. For values of BT less than 0.33 or so, the ISI has to be removed with an equalizer of some kind (decision feedback, MLSE). For BT of 0.5, the ISI can probably be ignored. John
Reply by ●March 6, 20062006-03-06
> >mguo wrote: >> This is a very nice forum and a lot of knowledgeable people here. Ihave a>> question don't know if any experts can share some thoughts on. >> >> If you are using GMSK over a wireless channel, and if you can chooseonly>> one feature to improve your system sensitivety, will you chooseadaptive>> equalizer or channel coding? Which provides more benefit? >> >> GSM has both while DECT seems to have none. > >It depends on the channel response but lets pretend that it is AWGN. >GMSK has controlled levels of ISI introduced to constrain the bandwidth >of the signal. The BT of the Gaussian LPF is what determines the ISI. >For values of BT less than 0.33 or so, the ISI has to be removed with >an equalizer of some kind (decision feedback, MLSE). For BT of 0.5, >the ISI can probably be ignored. > >John > >Thanks for all the reply. Very helpful.
Reply by ●March 8, 20062006-03-08