Posts tagged ‘MIMO’

The RF Path to 5G

Kevin Linehan, Vice President, Chief Technology Officer Antenna Systems CommScope

Kevin Linehan, Vice President, Chief Technology Officer
Antenna Systems
CommScope

The roll-out of any new generation of mobile network technology is never as simple as flicking a switch. Much of the current discussion around 5G is about its definition. But 5G won’t truly happen until it can actually happen in the network. Like all grand designs, obstacles need to be overcome in order to achieve that goal.

Like other industry commentators, my fundamental viewpoint is that 5G will be a “network of networks.” Network densification involving macro sites, in-building wireless, metro cells and small cells will continue on the way to 5G. This densification adds more complexity to wireless networks and demands ever more sophisticated infrastructure solutions. Managing these multiple network layers efficiently is becoming ever more important to deliver 5G speeds and throughput.

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Interview: Vice President, Advanced Technology & Strategy, U.S. Cellular: “Carrier aggregation and small cells are two features of LTE Advanced that provide an immediate benefit.”

Narothum Saxena, Vice President, Advanced Technology & Strategy US Cellular

Narothum Saxena, Vice President, Advanced Technology & Strategy US Cellular

Narothum Saxena, Vice President, Advanced Technology & Strategy US Cellular, USA is taking part in a keynote panel discussion on LTE Advanced on Day One of the LTE North America conference, taking place on the 21st-22nd November 2013, in Dallas, Texas, USA. Ahead of the show he explains what the key aspects of LTE Advanced are and why the technology is so important to operators.

What are operators getting so excited about LTE-Advanced, and in particular Carrier Aggregation?

Carrier aggregation allows the operators to increase the bandwidth by aggregating different blocks and sizes of contiguous or non-contiguous spectrum which could be intra-band or inter-band. It allows for efficient management and utilisation of spectrum. For example, if a carrier has 10MHz of AWS (Band 4) and 10MHz of lower 700MHz (Band 12) spectrum they can operate two independent LTE networks, but with carrier aggregation these two different bands can be aggregated into one 20MHz downlink pipe. It’s a more effective use of spectrum that potentially increases throughput. From an operator’s perspective, this provides many benefits such as supporting higher number of users and apps of the future that demand increased bandwidth.

The LTE North America conference is taking place on the 21st-22nd November 2013, in Dallas, Texas, USA. Click here NOW to download a brochure for the event.

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Juggling multiple bands – why choosing the right antenna is important

The Andrew Six Sector Solution converts a traditional three sector site into a higher capacity, six sector site with the use of only three antennas.

The Andrew Six Sector Solution converts a traditional three sector site into a higher capacity, six sector site with the use of only three antennas.

 This post is by Brendan Millard, Director-Wireless, Southeast Asia, at CommScope

Wireless operator networks are facing unprecedented demands for more and more capacity every day, driven by the services available on smartphones, tablets and laptops. In order to meet these demands they are looking to newer technologies in both existing and new frequency bands such as refarming 1800MHz GSM spectrum to be used for LTE or implementing new LTE networks in 700MHz.  These days, it seems there are two things a wireless operator cannot get enough of: spectrum and tower space to hang the antennas required for these new services.

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Sculpting your way to minimal interference

This post is by Philip Sorrells vice president of strategic marketing, wireless, at CommScope

LTE rollouts are now happening all across Asia and have the potential to completely reshape how networks perform. Many LTE networks incorporate a technology called multiple-input multiple-output (MIMO), which splits data transmission into multiple streams and sends them at the same time on the same frequency using multiple antennas. The expression 2×2 MIMO means that there are two antennas transmitting in the downlink to two antennas receiving in the handset.

What makes this development so exciting is that MIMO offers a way around a classic limiting factor of RF communications known as Shannon’s Law, which dictates how much throughput can be delivered down a given amount of bandwidth. As Figure 1 shows, you can only expect to get to within 3dB of a bandwidth’s theoretical maximum in a practical application. With 2×2 MIMO you can potentially double the capacity over a traditional 3G implementation, which otherwise would be bound by Shannon’s law.

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