1. Wireless Communication
... Armstrong unveiled his invention, Frequency Modulation (FM) to improve radio broadcasting. Because of the urgency for battlefield communications that were spawned from World War II, companies like AT&T (Bell Labs), Motorola and General Electric focused on refining mobile and portable communications. 1947 marked the largest effort to date to create a true cellular wireless infrastructure as AT&T engineers scattered multiple low-power ... at that time that the FCC gave tentative approval for this new "cellular service."" In 1977, the FCC authorized two experimental licenses, one to AT&T i...
- Word Count: 4161
- Approx Pages: 17
- Has Bibliography
- Grade Level: High School