Baseband/Multimedia Processing
Use microphone arrays for background acoustic noise suppression in portable devices--Part I
There is much value in improving the speech signal to background acoustic noise ratio. This two-part article explains the basic principle of using a microphone array for background acoustic noise suppression in a voice communications system.
Mobile Game Networking Essentials--Part IV
Here is Part IV of Chapter 14 from Beginning Mobile Phone Game Programming. Wireless network games bring with them their own unique set of problems and challenges that must be dealt with at the design level. Included in the excerpt are many techniques for solving them. For those of you who design mobile games, it's packed with great information--for the rest of you--it's an informative and fun read.
Winning the Pinewood Derby--Or using a CPLD to get the most from your cellular handset
CPLDs fit within the power and BOM budget of handset designs and are a less expensive alternative to upgrading to a more advanced chipset for differentiating features. Here's how, for example, to use a CPLD to hang a QWERTY keyboard off of a handset.
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Batteries/Power Management
How to select CPLDs for handheld applications
CPLDs offer designers a low-cost system solution with significant advantages compared to traditional implementations using ASICs and ASSPs.
The proper care and feeding of your battery
The proper care of your battery subsystem involves being cognizant of a host of battery-related complexities and options for addressing them.
How to meet the design challenges of WiMAX power amplifiers
Because WiMAX uses much higher modulation orders than cellular, it requires a much better SNR. For the mobile transmitter, this requires a PA with much better linearity and greatly complicates PA design compared to GSM or CDMA.
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RF/Antenna Design
Tutorial: Tuning the baseband-to-radio connection for wireless basestations
The migration of advanced features to lower end mobile phones is challenging base station manufacturers to deliver new levels of performance. The Common Public Radio Interface (CPRI) spec is tuned to do exactly that.
Zigbee Based Wireless Networks Improve Safety
Ultra low power ZigBee-based wireless networks are seeing usage for reliable and cost effective sense and control networks. Here's a comparison to other wireless nets, with a look at how Honeywell used the technology to monitor carbon monoxide in parking structures.
RF modules key to new mobile designs
In the highly competitive mobile handset business, manufacturers face continuous pressure to deliver sleek form factors with ever more functionality in increasingly compressed time frames.
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Software and Security
Mobile Game Networking Essentials--Part II
Here is an excerpt from Chapter 14 from Beginning Mobile Phone Game Programming. Wireless network games bring with them their own unique set of problems and challenges that must be dealt with at the design level. Included in the excerpt are many techniques for solving them. For those of you who design mobile games, it's packed with great information--for the rest of you--it's an informative and fun read.
Mobile Device Management (MDM): Ensure a full range of services
MDM technologies enable the management of any mobile device and ensure that all mobile devices that connect to an operator's network offer the full suite of mobile data services available. Data suggests that OMA DM has support across all key markets, and that this support is growing. Here's why.
H.264 encoder design using Application Engine Synthesis
SoC design for consumer products relies on standard algorithms such as H.264 and JPEG for their defining capabilities. To reduce both project cost and schedule risk, Application Engine Synthesis (AES) can automatically create an application engine such as an H.264 encoder from a sequential, untimed C algorithm.
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Storage Architectures
Use NAND Flash for cost, density and performance advantages for mobile handsets
This NAND flash tutorial covers recent trends, alternatives and even misconceptions regarding mobile handset storage subsystems that support multimedia features.
Mobile DDR spurs low-cost, low-power automotive electronics designs
In the memory unfriendly automotive environment, designers are having to seek out more and different system memory solutions. Here's one of the newest.
Tutorial: The H.264 Scalable Video Codec (SVC)
The H.264 Scalable Video Codec (SVC) reduces network bandwidth, eliminates transcoding, and simplifies storage management. Here's how it works.
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MOBILE HANDSET DESIGN CENTER ARCHIVE
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About the Mobile Handset DesignLine How-To Section
Mobile Handset DesignLine's How-To Section delivers detailed engineering articles focused on the design and development of cell phones and handsets based on 2G, 2.5G, 3G, 4G and WiMAX networks that may also include wireless networking options such as wireless LANs, (WLANs), WiMAX, fixed broadband wireless, WiBree, ZigBee, wireless mesh networking, ultrawideband (UWB), Bluetooth, and Enhanced Data Rate (EDR) Bluetooth. Design topics also covered in this category include mobile TV, radio frequency (RF) design, coexistence, multimedia audio and video processing, antenna engineering, baseband processing, memory, media access controller (MAC) design and physical-layer design.
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