Point-to-Point Microwave Backhaul

Wireless Point-to-Point (P2P) Microwave Backhaul Systems are network extensions or traffic overflow management devices in cellular and broadband networks.

Block Diagram

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Design Considerations

Wireless Point-to-Point (P2P) Microwave Backhaul Systems are network extensions or traffic overflow management devices in cellular and broadband networks. P2P microwave backhaul systems are deployed in two stages: outdoor and indoor units connected to each other by a coaxial cable (includes RF signal and DC power). The outdoor unit contains an antenna and microwave compatible components used to down or up convert RF signals within 7 – 38 GHz. The major components of the indoor unit include the processor, modem unit, and power section.

Processor

The P2P system processor unit routes high speed signals, monitors system status, and performs baseband processing. High speed performance and low power consumption are key attributes for the P2P processor as seen in TI’s TMS320TCI64x DSP family. The DSPs also support several interfaces and wireless protocols including GSM, CDMA, and WiMax for faster development and time-to-market. For example, TI’s TCI6482 features Gigabit Ethernet connectivity for direct connectivity to the network, a DDR2 memory external interface, and CDMA enhanced software toolkits.

Modem Unit

The modem unit employs complex demodulation/modulation to suppress the carrier and sidebands for a cost effective, low noise (phase) solution as seen in the TI’s TRF37xx family. Furthermore, ultra-low jitter clocking enables accurate sampling in the modem unit’s data converters. The local oscillator into the demodulator/modulator requires low phase noise as shown in the TRF3750 (please see TSW3000: RF Transmit Signal Chain evaluation module for complete transmit solution). The modem unit’s Digital-to-Analog Converter and Analog-to-Digital Converter support high SNR and high SFDR at P2P application frequencies (i.e. TI’s DAC5662 & ADS62P15). For integrated solutions in the modem, TI can provide a cost effective, low power ASIC versus power hungry FPGAs.

Power

P2P indoor units are typically powered by a -48V bus which is routed to the outdoor unit. Secondary voltages can be accomplished with traditional system power, digital power, or power modules depending on the design preference. The key power attributes of the indoor units include electronic soft start and short circuit protection (i.e TPS40021), under voltage protection (i.e. TPS545x family), and the ability to withstand transients (i.e TPS74x family.)

Application Notes (6)

Title Abstract Type Size (KB) Date Views
HTM 9 KB 13 May 2010 143
HTM 8 KB 21 Nov 2008 294
HTM 8 KB 05 Sep 2008 98
HTM 9 KB 04 Sep 2008 412
HTM 9 KB 28 Nov 2007 23
HTM 9 KB 24 Aug 2006 38

User Guides (1)

Title Abstract Type Size (KB) Date Views
pdf 1.48 MB 24 Mar 2006 383
    

Reference Designs

Description Part Number Company Tool Type
TPS2350 -48V ATCA Hot Swap Reference Design with FET OR-ing TPS2350ATCA Texas Instruments Reference Designs
TPS2393 200W ATCA Hot Swap Reference Design TPS2393ATCA Texas Instruments Reference Designs
TPS54418 Reference Design Optimized for Small Size PMP4856 Texas Instruments Reference Designs
TPS54620 Reference Design for Fast Transient Response PMP4854-1 Texas Instruments Reference Designs
TPS54620 Reference Design Optimized for Small Size PMP4854-2 Texas Instruments Reference Designs

Selection and Solution Guides

Selection Guides (2)

Title Abstract Type Size (KB) Date Views
PDF 9.51 MB 01 May 2014 22935
PDF 146 KB 01 Sep 2010 303

Tools and Software

Name Part # Company Software/Tool Type
Code Composer Studio (CCS) Integrated Development Environment (IDE) CCSTUDIO Texas Instruments SW Development Tools, IDEs, Compilers

Product Bulletin & White Papers

Product Bulletin (5)

Title Abstract Type Size (MB) Date Views
PDF 249 KB 31 May 2013 315
PDF 228 KB 09 Jun 2011 373
PDF 208 KB 25 Apr 2011 615
PDF 563 KB 26 Nov 2008 310
PDF 362 KB 02 Mar 2005 80

White Papers (5)

Title Abstract Type Size (MB) Date Views
PDF 3.95 MB 31 May 2013 945
PDF 1014 KB 17 May 2011 751
PDF 562 KB 21 Dec 2010 447
PDF 423 KB 09 Nov 2010 495
PDF 180 KB 26 Oct 2009 246

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