tailieunhanh - Ultra Wideband Part 2

Tham khảo tài liệu 'ultra wideband part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 24 Ultra Wideband Fig. 3 shows the downlink microcell normalized capacity as a function of the separation between the UMTS mobile and the UWB transmitter. It can be noticed that the microcell capacity reduction is high when the separation is lower than m. For larger separation the capacity reduction is lower and at a distance higher than 3 m the capacity reduction is negligible. Next we study the case of a data service Gp dB Eb No dB assuming an UWB power density of -60 dBm MHz and an UMTS total interference of -92 dBm 10 dB noise rise . In this case the downlink microcell range is calculated to be km. Fig. 4 shows the downlink microcell range as a function of the separation between the UMTS mobile and the UWB transmitter. It can be noticed that the UWB signal creates a high interference which reflects as a microcell range reduction when the separation is less than 1 m. For larger separations the interference is lower. At a distance higher than 6 m the effect of the interference is negligible. Separation between the UMTS mobile and the UWB source m Fig. 4. Effect of the UWB interference on the UMTS microcell range as a function of the separation between the UWB transmitter and the UMTS mobile PUWB -60 dBm MHz . Fig. 5 shows the downlink microcell normalized capacity as a function of the separation between the UMTS mobile and the UWB transmitter. It can be noticed that the microcell capacity reduction is high when the separation is less than 2 m. For larger separation the reduction is lower and for a distance higher than 9 m the capacity reduction is very small. Let us now study the data service case assuming a PUWB of -80 dBm MHz. Fig. 6 shows the downlink microcell range as a function of the separation between the UMTS mobile and the UWB transmitter. It can be noticed that the UWB signal creates a high interference which reflects a microcell range reduction when the separation is less than m. For larger separation the interference is .

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