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23February 23, 2016

LTE: Relation between PCI and ZC root sequence

February 23, 2016|0 Comments

Questions / Problems description: May you please mention if there is any relation between PCI and ZC root sequence? what is their impact in case of bad planning? Answer: Physical Cell ID (PCI) is used [...]

28December 28, 2015

LTE UL: PRACH signal generation

December 28, 2015|Tags: , , , |0 Comments

Questions / Problems description: Hello everyone, I am facing a problem of sub-carrier spacing of 1.25kHz for PRACH channel which is restricted to only 6RBs for mapping, which include cyclic prefix(T_cp) and sequence(T_seq) for four [...]

27June 27, 2014

LTE: UE Downlink Throughput Limitation

June 27, 2014|Tags: , , , , , , , , |0 Comments

Questions / Problems description: How to know from L3 message the UE downlink throughput is limited by: 1. Transmission Capacity, 2. MME UE configuration (means USIM config to limited the DL throughput). Answer: There are [...]

26June 26, 2014

LTE-Advanced: How we can manage PRS in eICIC?

June 26, 2014|Tags: , , , |0 Comments

Questions / Problems description: If ABS subframe of serving cell coincide with PRS of serving cell, how we are going to hadle this situation: 1) Are we going to schedule PRS? or 2) Are we [...]

17June 17, 2014

LTE Scheduling info: Predefined transport block sizes

June 17, 2014|Tags: , , , , |0 Comments

Questions / Problems description: I would like to ask you about transport block sizes. According to 3GPP TS36.213 we should chose TB size from table According to 3GPP TS36.101 we have special algorithm to [...]

17June 17, 2014

LTE MIMO: Do LTE PHY Layer uses SVD?

June 17, 2014|Tags: , , , |0 Comments

Questions / Problems description: Do LTE physical layer need using a SVD decomposition in case 4x4 antena structure? Answer: Singular Value Decomposition (SVD) is one of the possible approaches for MIMO decoding (aka deprecoding). Deprecoding [...]

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