Sorrento Mesa in San Diego in San Diego County, California — The American West (Pacific Coastal)

Development of CDMA for Cellular Communications

1989

— IEEE Milestone —

Cellular Communications Marker image. Click for full size.

Photographed by Craig Baker, March 11, 2022

1. Cellular Communications Marker

Inscription. On 7 November 1989, Qualcomm publicly demonstrated a digital cellular radio system based on Code Division Multiple Access (CDMA) spread spectrum technology, which increased capacity, improved service quality, and extended battery life. This formed the basis for IS-95 second-generation standards and third-generation broadband standards that were applied to cellular mobile devices worldwide.

Erected 2017 by Institute of Electrical and Electronics Engineers.

Topics and series. This historical marker is listed in these topic lists: Communications • Industry & Commerce • Science & Medicine. In addition, it is included in the IEEE Milestones in Electrical Engineering and Computing series list. A significant historical date for this entry is November 7, 1989.

Location. 32° 53.73′ N, 117° 11.764′ W. Marker is in San Diego, California, in San Diego County. It is in Sorrento Mesa. It can be reached from Morehouse Drive 0.4 miles east of Scranton Road, on the right when traveling east. Located in the courtyard between the buildings. Touch for map. Marker is at or near this postal address: 5775 Morehouse Dr, San Diego CA 92121, United States of America. Touch for directions.

Regionally, this marker is in California’s Peninsular Ranges.

It is also on the American Pacific Coast.

Globally, it is in North America,

on the Ring of Fire,

in the Pacific Rim,

in the Western Hemisphere,

in the Western World,

and in the Anglosphere.

Historically, it finds itself in what was once New Spain

and also Mexico’s Alta California.

Other nearby markers. At least 8 other markers are within 5 miles of this marker, measured as the crow flies: The Butterfly Project (approx. 2 miles away); Theodor Seuss Geisel Memorial

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(approx. 2.6 miles away); Washington to Baltimore 1844 Telegraph Message (approx. 2.9 miles away); Torrey Pines Gliderport (approx. 3.2 miles away); Conserving California's Coastal Treasures (approx. 3.4 miles away); Torrey Pines Lodge (approx. 3.7 miles away); Ellen Browning Scripps (approx. 3.8 miles away); John “Manila John” Basilone (approx. 4.8 miles away). Touch for a list and map of all markers in San Diego.

Photographed by Craig Baker, March 11, 2022

2. Cellular Communications Marker

Credits. This page was last revised on October 28, 2024. It was originally submitted on March 16, 2022, by Craig Baker of Sylmar, California. This page has been viewed 288 times since then and 20 times this year. Photos: 1, 2. submitted on March 16, 2022, by Craig Baker of Sylmar, California.