Guard Band Requirement in LTE Here I write on simple how guard band requirement for LTE for 2 option. Guard band requirement LTE verses GSM and guard band requirement LTE FDD verse LTE TDD Guard Band Requirement: LTE-FDD vs GSM/UMTS Configuration is simpler for FDD based systems because both LTE FDD and its neighboring technologies … Read more
Adjacent Channel Interference Ratio for LTE It is difficult to separate Adjacent Channel Leakage power Ratio and Adjacent channel selectivity because they coexist. therefore, Adjacent Channel Leakage power Ratio and Adjacent channel selectivity are usually considered together. The result of the consideration is Adjacent Channel Interference Ratio (ACIR) and Adjacent Channel Interference Ratio is the … Read more
Adjacent channel selectivity and Adjacent Channel Leakage power Ratio for LTE Adjacent channel selectivity (ACS) is a protection index to determine the capability of a receive filter. Adjacent channel selectivity refers to the capability to receive the power of the local in band channel when the interference signal from the adjacent frequency exists. Adjacent channel … Read more
Inter Modulation Interference for LTE When multiple strong signals with different frequencies enter a receiver at the same time, the inter modulation product at the receiver is generated by the signals by the front end due to the non-linear circuit of the receiver. Unfortunately, the frequency of the inter modulation product drops into the useful … Read more
Spurious Interference and Blocking Interference for LTE Spurious interference refers to the additive interference generated by the interference source in the working frequency band of the interfered receiver. Spurious interference includes the out of band power leakage of the interference source, amplified background noise, and transmit inter-modulation product. Spurious interference can reduce the signal noise … Read more
LTE Link Budget Tool Parameter and Example of LTE Link Budget Tool The LTE link budget tool support the analysis for DL Traffic, UL Traffic, as well as signaling channel. Then the smallest radius is used as the final coverage radius based on the link balance principle. First of all I clear LTE Link budget … Read more
Reference Signal Power Boosting Gain for LTE Power boosting in LTE is mainly perform on the Reference signal. However, since the radio power is shared equally by all Resources element, the power allocation for each RE is fixed. By increasing the number of Resources element being used as Reference Signal, the RS can be “boosted’ … Read more
What Interference Rejection Combining in LTE The concept of Interference Rejection Combining (IRC) is to regenerate the transmitted signal based on the estimated data from the previous receptions, emulate the distortion occurring from the multi-path channels and, finally subtract all regenerated interfering signals from the uplink received signals to obtain more reliable estimation of original … Read more
How TTI Bundling for LTE link Budget Here I just review how TTI Bundling for LTE link budget first lets see what link budget feature overview. Features Overview Below is a quick summary of specific features and their corresponding impact on the radio network link budget result if the features or functionalities are deployed. TTI … Read more
Salient Future for Mobile WiMAX WiMAX is a wireless broadband solution that offers a rich set of features with a lot of flexibility in terms of deployment options and potential service offerings. Some of the more salient features that deserve highlighting are as follows: OFDM-based physical layer: The WiMAX physical layer (PHY) is based on … Read more