Question / Problem description: In which scenario we go for maximum likelihood detector and MMSE detector at receiver side and its implementation steps to follow? Answer: The selection of the detector typically is done based on the complexity and performance … Continue reading
Question / Problem description: What benefit does have the combined use of LTE band 13 and 14? Answer: LTE band 13 and 14 are placed in the frequency domain just next to each other (at 700MHz) so you can benefit … Continue reading
Question / Problem description: During the training we talked about the example eNB transmitter power of 46dBm for 20MHz channel. Does the power remains the same or the other for narrower bands? Answer: These values: 46dBm for bands 10, 15, … Continue reading
Question / Problem description: Do we have DSCP marking on the outer IP header (the one above GTP) and how do they look? What specification relate to this topic? Answer: Specifications that relate to the S1 interface (also touching … Continue reading
Question / Problem description: Can anybody explain main point of using dual stream before layer-mapper in LTE-advanced? What is the advantage in this case? Answer: If I understand your question properly, you mean dual stream as two transport blocks … Continue reading
Question / Problem description: Do MIMO precoding matrices consist of complex elements? Answer: Yes it does. See the example below: There are complex matrixes for transmit diversity, spatial multiplexing and cyclic delay diversity. For references see: 3GPP TS 36.211, … Continue reading
Question / Problem description: Does a UE define or indicate Access Point Name during Attach procedure? Answer: UE does not need to (but it can if it is configured with one) to define APN. This can be a parameter … Continue reading
Question / Problem Description: Are the Rel10 CSI reference signals overlapping with “normal” RSs? Answer: No, they are not overlapping. They are transmitted on a separate REs within a slot (i.e. in the last two OFDMA symbols in a … Continue reading
Question / Problem description: How many symbols are present in RACH sequence and what’s its length? Answer: PRACH sequence consists of 839 complex samples (based on Zadoff-Chu sequence). The duration of PRACH sequence (the PRACH sequence format 1 – most … Continue reading
Here are materials from Workshop on ‘LTE System Modelling Tool’ delivered in February 2013 in Warsaw, Poland. Are you interested in attending top in class LTE/LTE-Advanced courses? Please have a look on our course portfolio: http://is-wireless.com/trainings/lte-lte-advanced or contact us directly: … Continue reading