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search DVB modems
Hello,   I’m looking for modems which support DVB/S2 and DVB/RCS. Has anyone recommendations on such products?   Owen
Sunday, 26 October 2014 - 14:32
synchronization marker for receiver in Simulink
Hi, In a communication system a marker of 32 bits is used to synchronize the receiver. After these 32 bits, 255 data bytes shall be processed. The problem is, how to achieve this...
Wednesday, 13 November 2013 - 08:29
two questions to RF converters
Hi, Recently I've been reading articles about RF converters and have two questions to the parameters. 1. IIP3 or OIP3 Is it correct, that for upconverters OIP3 is critical and for...
Sunday, 22 September 2013 - 14:23
depth of interleaver
Hi, There is an interleaver with K = 4000. As far as I know the depth of general interleaver can seldom be greater than 16. Is this 4000 really the depth? Thanks Owen
Thursday, 13 June 2013 - 07:49
orthogonal or orthonormal?
Hi, I don't know if it is the right place to post such a question. In my textbook "Digital Communications" there are two similar English words: orthogonal and orthonormal. Do they...
Saturday, 8 June 2013 - 02:04
forums on communication technologies
Hello, I'm looking for forums in which communication technologies are discussed intensively. Can anyone recommend some? Thanks Senmeis
Tuesday, 21 May 2013 - 08:00
positoning in a tall building
Hi, I'm looking for information about positioning in a big market. Something like GPS but only in a building or in an area of 1km * 1km. The tolerance can be as small as 18 cm. I'...
Wednesday, 9 January 2013 - 13:21
AVR055 "Using a 32kHz XTAL for run-time calibration...&
Hi, I have been reading AVR055 "Using a 32kHz XTAL for run-time calibration of the internal RC". The code does a calibration only at the beginning. My question is, is it possible...
Tuesday, 7 February 2012 - 09:52
USI UART accroding to AVR307
Hello, I am trying to use USI of ATmega169 as a UART according to AVR307. It works but not in Power Save mode, only in Idle mode. The USI UART driver can be downloaded from Atmel...
Wednesday, 18 January 2012 - 09:44
1s interrupt with a 32.768kHz crystal oscillator
Hello, The following code is taken from the example code of AVR Butterfly. void RTC_init(void) { Delay(1000); // wait for 1 sec to let the Xtal stabilize after...
Monday, 16 January 2012 - 01:01
general Zigbee questions
Hi, There is a mode in Zigbee called Beacon. Is this mode just a synchronous mode? As far as I understand a Zigbee router is very similar to a router in a computer network. Is...
Wednesday, 4 January 2012 - 01:04
compatibility of Zigbee devices
Hi, I am a newbie to Zigbee. Someone told me that Zigbee devices of different manufacturers are not compatible. Does that mean, that all devices in one Zigbee network must use the...
Wednesday, 7 December 2011 - 09:11