Performance studies between wimax (802.16m) and lte advanced for 4g

Abstract

Wimax - 802.16m and LTE Advanced are working in similarities to compromise ITU IMT advanced which is the base line for the 4G requirement and working with an aim for optimizations for improved interworking and coexistence. The 2.5/2.6GHz frequency spectrum is proposed for the future of Wimax & LTE advanced to 4G. There are total of 9 communication network player candidates and each have a 20MHz block of bandwidth. One is new comer which is Puncak Semangat Sdn Bhd and the rest are existing companies which are Celcom (M) Bhd, DiGi.Com Bhd, Maxis Bhd and U Mobile and four WiMAX players – Asiaspace Sdn Bhd, Packet One Networks Sdn Bhd, REDTone International Bhd and YTL Communications Bhd. The study is to analysis the Wimax - 802.16m and LTE which is documented in Release 8 of the 3GPP specifications advanced for 4G system technical specification and requirement; To understand current technology facility for 802.16m and LTE advanced for 4G system; and to study unacceptable levels of inter-system interference for Wimax and LTE which two different operating systems with differing duplex methods in close proximity to one another. The LTE time division duplex (LTE-TDD) and LTE frequency division duplex (LTE-FDD) are the most practical evolution paths towards 4G technology. In harmonized FDD-FDD and synchronized TDD-TDD coexistence scenarios BS-to-BS interference is not typically a major issue because the case in which a receiver has to operate on a frequency adjacent to an operating transmitter is avoided. However in FDD-TDD scenarios this is not the case. Collocating BS equipment may lead to crippling inter-system interference, with the transmitter of one system blocking the receiver of another. Therefore, when considering FDD-TDD systems a compromise needs to be found that achieves an acceptable tradeoff between BS-to-SS and BS-to-BS interference. The objective of this study is to find out the minimum guard band and minimum distance requirement between Wimax- TDD block as Victim link and LTE – FDD block as Interference link by using SEAMCAT (Spectrum Engineering Advanced Monte-Carlo Analysis Tool) software. Several scenarios between LTE-FDD block and Wimax-FDD block which are BS-to-BS, MS-MS, BSMS, and MS-BS adjacent-channel interferences and variation of distance between LTE and Wimax devices have been studied. The results obtained provide some figure regarding the minimum guard-band required and minimum distance between LTE-Interferer link and Wimax- Victim lin